195644519040 has 512 divisors, whose sum is σ = 673243280640. Its totient is φ = 48150609920.

The previous prime is 195644519039. The next prime is 195644519111. The reversal of 195644519040 is 40915446591.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 696243700 + ... + 696243980.

Almost surely, 2^195644519040 is an apocalyptic number.

195644519040 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 195644519040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (336621640320).

195644519040 is an abundant number, since it is smaller than the sum of its proper divisors (477598761600).

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

195644519040 is a wasteful number, since it uses less digits than its factorization.

195644519040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660 (or 648 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 48.

The spelling of 195644519040 in words is "one hundred ninety-five billion, six hundred forty-four million, five hundred nineteen thousand, forty".