1995239915520 has 544 divisors, whose sum is σ = 6642518897664. Its totient is φ = 510866227200.

The previous prime is 1995239915507. The next prime is 1995239915573. The reversal of 1995239915520 is 255199325991.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7100497780 + ... + 7100498060.

Almost surely, 2^{1995239915520} is an apocalyptic number.

1995239915520 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 1995239915520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3321259448832).

1995239915520 is an abundant number, since it is smaller than the sum of its proper divisors (4647278982144).

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

1995239915520 is an equidigital number, since it uses as much as digits as its factorization.

1995239915520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585 (or 555 counting only the distinct ones).

The product of its (nonzero) digits is 9841500, while the sum is 60.

The spelling of 1995239915520 in words is "one trillion, nine hundred ninety-five billion, two hundred thirty-nine million, nine hundred fifteen thousand, five hundred twenty".