77704804013780 has 48 divisors (see below), whose sum is σ = 172912132418256. Its totient is φ = 29231018311680.

The previous prime is 77704804013777. The next prime is 77704804013789. The reversal of 77704804013780 is 8731040840777.

It can be written as a sum of positive squares in 8 ways, for example, as 35957724418576 + 41747079595204 = 5996476^2 + 6461198^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77704804013789) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87663701 + ... + 88545660.

It is an arithmetic number, because the mean of its divisors is an integer number (3602336092047).

Almost surely, 2^{77704804013780} is an apocalyptic number.

It is an amenable number.

77704804013780 is an abundant number, since it is smaller than the sum of its proper divisors (95207328404476).

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

77704804013780 is a wasteful number, since it uses less digits than its factorization.

77704804013780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176210684 (or 176210682 counting only the distinct ones).

The product of its (nonzero) digits is 7375872, while the sum is 56.

The spelling of 77704804013780 in words is "seventy-seven trillion, seven hundred four billion, eight hundred four million, thirteen thousand, seven hundred eighty".