769921200012978 has 48 divisors (see below), whose sum is σ = 1796485314962520. Its totient is φ = 236898499133952.

The previous prime is 769921200012953. The next prime is 769921200012989. The reversal of 769921200012978 is 879210002129967.

It can be written as a sum of positive squares in 4 ways, for example, as 248591887639209 + 521329312373769 = 15766797^2 + 22832637^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 204988618 + ... + 208710746.

Almost surely, 2^{769921200012978} is an apocalyptic number.

769921200012978 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

769921200012978 is an abundant number, since it is smaller than the sum of its proper divisors (1026564114949542).

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

769921200012978 is a wasteful number, since it uses less digits than its factorization.

769921200012978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4606123 (or 4606120 counting only the distinct ones).

The product of its (nonzero) digits is 13716864, while the sum is 63.

The spelling of 769921200012978 in words is "seven hundred sixty-nine trillion, nine hundred twenty-one billion, two hundred million, twelve thousand, nine hundred seventy-eight".