1995858224640 has 960 divisors, whose sum is σ = 8040171110400. Its totient is φ = 448147095552.

The previous prime is 1995858224639. The next prime is 1995858224641. The reversal of 1995858224640 is 464228585991.

1995858224640 is a `hidden beast` number, since 1 + 9 + 9 + 5 + 8 + 582 + 2 + 4 + 6 + 40 = 666.

It is an interprime number because it is at equal distance from previous prime (1995858224639) and next prime (1995858224641).

It is a tau number, because it is divible by the number of its divisors (960).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1995858224641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4879848756 + ... + 4879849164.

It is an arithmetic number, because the mean of its divisors is an integer number (8375178240).

Almost surely, 2^{1995858224640} is an apocalyptic number.

1995858224640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1995858224640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4020085555200).

1995858224640 is an abundant number, since it is smaller than the sum of its proper divisors (6044312885760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1995858224640 is a wasteful number, since it uses less digits than its factorization.

1995858224640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 907 (or 888 counting only the distinct ones).

The product of its (nonzero) digits is 49766400, while the sum is 63.

The spelling of 1995858224640 in words is "one trillion, nine hundred ninety-five billion, eight hundred fifty-eight million, two hundred twenty-four thousand, six hundred forty".