195939920440 has 64 divisors (see below), whose sum is σ = 481088043360. Its totient is φ = 71229457920.

The previous prime is 195939920401. The next prime is 195939920483. The reversal of 195939920440 is 44029939591.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1436482 + ... + 1566958.

Almost surely, 2^195939920440 is an apocalyptic number.

195939920440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

195939920440 is an abundant number, since it is smaller than the sum of its proper divisors (285148122920).

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

195939920440 is a wasteful number, since it uses less digits than its factorization.

195939920440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133912 (or 133908 counting only the distinct ones).

The product of its (nonzero) digits is 3149280, while the sum is 55.

The spelling of 195939920440 in words is "one hundred ninety-five billion, nine hundred thirty-nine million, nine hundred twenty thousand, four hundred forty".