78809708976 has 80 divisors (see below), whose sum is σ = 204185097984. Its totient is φ = 26193468672.

The previous prime is 78809708969. The next prime is 78809709007. The reversal of 78809708976 is 67980790887.

It is a self number, because there is not a number n which added to its sum of digits gives 78809708976.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40769706 + ... + 40771638.

Almost surely, 2^78809708976 is an apocalyptic number.

It is an amenable number.

78809708976 is an abundant number, since it is smaller than the sum of its proper divisors (125375389008).

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

78809708976 is a wasteful number, since it uses less digits than its factorization.

78809708976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3978 (or 3972 counting only the distinct ones).

The product of its (nonzero) digits is 85349376, while the sum is 69.

The spelling of 78809708976 in words is "seventy-eight billion, eight hundred nine million, seven hundred eight thousand, nine hundred seventy-six".