77654806564 has 12 divisors (see below), whose sum is σ = 135899694000. Its totient is φ = 38826322568.

The previous prime is 77654806543. The next prime is 77654806601. The reversal of 77654806564 is 46560845677.

It is a junction number, because it is equal to n+sod(n) for n = 77654806499 and 77654806508.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96034 + ... + 405625.

It is an arithmetic number, because the mean of its divisors is an integer number (11324974500).

Almost surely, 2^77654806564 is an apocalyptic number.

It is an amenable number.

77654806564 is a deficient number, since it is larger than the sum of its proper divisors (58244887436).

77654806564 is a wasteful number, since it uses less digits than its factorization.

77654806564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540362 (or 540360 counting only the distinct ones).

The product of its (nonzero) digits is 33868800, while the sum is 58.

The spelling of 77654806564 in words is "seventy-seven billion, six hundred fifty-four million, eight hundred six thousand, five hundred sixty-four".