764678531216 has 40 divisors (see below), whose sum is σ = 1503736817184. Its totient is φ = 376643974400.

The previous prime is 764678531191. The next prime is 764678531261. The reversal of 764678531216 is 612135876467.

It is a happy number.

It is a super-2 number, since 2×764678531216² (a number of 25 digits) contains 22 as substring.

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, 368885 + ... + 1290516.

Almost surely, 2^764678531216 is an apocalyptic number.

It is an amenable number.

764678531216 is a deficient number, since it is larger than the sum of its proper divisors (739058285968).

764678531216 is a wasteful number, since it uses less digits than its factorization.

764678531216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1659839 (or 1659833 counting only the distinct ones).

The product of its digits is 10160640, while the sum is 56.

The spelling of 764678531216 in words is "seven hundred sixty-four billion, six hundred seventy-eight million, five hundred thirty-one thousand, two hundred sixteen".