78804969761 has 12 divisors (see below), whose sum is σ = 92775562992. Its totient is φ = 66733292808.

The previous prime is 78804969757. The next prime is 78804969799. The reversal of 78804969761 is 16796940887.

It is not a de Polignac number, because 78804969761 - 2² = 78804969757 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78804999761) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9684275 + ... + 9692408.

It is an arithmetic number, because the mean of its divisors is an integer number (7731296916).

Almost surely, 2^78804969761 is an apocalyptic number.

It is an amenable number.

78804969761 is a deficient number, since it is larger than the sum of its proper divisors (13970593231).

78804969761 is a wasteful number, since it uses less digits than its factorization.

78804969761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19376780 (or 19376773 counting only the distinct ones).

The product of its (nonzero) digits is 36578304, while the sum is 65.

The spelling of 78804969761 in words is "seventy-eight billion, eight hundred four million, nine hundred sixty-nine thousand, seven hundred sixty-one".