77688495472 has 40 divisors (see below), whose sum is σ = 172121233536. Its totient is φ = 33276351936.

The previous prime is 77688495463. The next prime is 77688495487. The reversal of 77688495472 is 27459488677.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 77688495398 and 77688495407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6063 + ... + 394225.

Almost surely, 2^77688495472 is an apocalyptic number.

It is an amenable number.

77688495472 is an abundant number, since it is smaller than the sum of its proper divisors (94432738064).

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

77688495472 is a wasteful number, since it uses less digits than its factorization.

77688495472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389965 (or 389959 counting only the distinct ones).

The product of its digits is 189665280, while the sum is 67.

It can be divided in two parts, 776884 and 95472, that added together give a square (872356 = 934²).

The spelling of 77688495472 in words is "seventy-seven billion, six hundred eighty-eight million, four hundred ninety-five thousand, four hundred seventy-two".