195977278968 has 32 divisors (see below), whose sum is σ = 489991323600. Its totient is φ = 65319342848.

The previous prime is 195977278963. The next prime is 195977278969. The reversal of 195977278968 is 869872779591.

It is a junction number, because it is equal to n+sod(n) for n = 195977278893 and 195977278902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195977278963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148383 + ... + 643406.

Almost surely, 2^195977278968 is an apocalyptic number.

It is an amenable number.

195977278968 is an abundant number, since it is smaller than the sum of its proper divisors (294014044632).

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

195977278968 is a wasteful number, since it uses less digits than its factorization.

195977278968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802111 (or 802107 counting only the distinct ones).

The product of its digits is 960180480, while the sum is 78.

The spelling of 195977278968 in words is "one hundred ninety-five billion, nine hundred seventy-seven million, two hundred seventy-eight thousand, nine hundred sixty-eight".