77764034648820 has 48 divisors (see below), whose sum is σ = 234488473712640. Its totient is φ = 19141916221056.

The previous prime is 77764034648809. The next prime is 77764034648857. The reversal of 77764034648820 is 2884643046777.

It is a congruent number.

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, 49848739380 + ... + 49848740939.

It is an arithmetic number, because the mean of its divisors is an integer number (4885176535680).

Almost surely, 2^{77764034648820} is an apocalyptic number.

It is an amenable number.

77764034648820 is an abundant number, since it is smaller than the sum of its proper divisors (156724439063820).

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

77764034648820 is a wasteful number, since it uses less digits than its factorization.

77764034648820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99697480344 (or 99697480342 counting only the distinct ones).

The product of its (nonzero) digits is 303464448, while the sum is 66.

The spelling of 77764034648820 in words is "seventy-seven trillion, seven hundred sixty-four billion, thirty-four million, six hundred forty-eight thousand, eight hundred twenty".