195709371920 has 40 divisors (see below), whose sum is σ = 460506525696. Its totient is φ = 77340568448.

The previous prime is 195709371911. The next prime is 195709371931. The reversal of 195709371920 is 29173907591.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14730512 + ... + 14743791.

Almost surely, 2^195709371920 is an apocalyptic number.

195709371920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

195709371920 is an abundant number, since it is smaller than the sum of its proper divisors (264797153776).

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

195709371920 is a wasteful number, since it uses less digits than its factorization.

195709371920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29474399 (or 29474393 counting only the distinct ones).

The product of its (nonzero) digits is 1071630, while the sum is 53.

The spelling of 195709371920 in words is "one hundred ninety-five billion, seven hundred nine million, three hundred seventy-one thousand, nine hundred twenty".