195078520812 has 48 divisors (see below), whose sum is σ = 520354419200. Its totient is φ = 55721181312.

The previous prime is 195078520789. The next prime is 195078520817. The reversal of 195078520812 is 218025870591.

It is not an unprimeable number, because it can be changed into a prime (195078520817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18937 + ... + 624912.

Almost surely, 2^195078520812 is an apocalyptic number.

195078520812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

195078520812 is an abundant number, since it is smaller than the sum of its proper divisors (325275898388).

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

195078520812 is a wasteful number, since it uses less digits than its factorization.

195078520812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647470 (or 647468 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 48.

The spelling of 195078520812 in words is "one hundred ninety-five billion, seventy-eight million, five hundred twenty thousand, eight hundred twelve".