195012513878 has 24 divisors (see below), whose sum is σ = 366452088912. Its totient is φ = 77147807184.

The previous prime is 195012513853. The next prime is 195012513889. The reversal of 195012513878 is 878315210591.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 76534250 + ... + 76536797.

It is an arithmetic number, because the mean of its divisors is an integer number (15268837038).

Almost surely, 2^195012513878 is an apocalyptic number.

195012513878 is a deficient number, since it is larger than the sum of its proper divisors (171439575034).

195012513878 is a wasteful number, since it uses less digits than its factorization.

195012513878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153071076 (or 153071069 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 50.

The spelling of 195012513878 in words is "one hundred ninety-five billion, twelve million, five hundred thirteen thousand, eight hundred seventy-eight".