78929429680 has 40 divisors (see below), whose sum is σ = 183611489184. Its totient is φ = 31554470400.

The previous prime is 78929429669. The next prime is 78929429699. The reversal of 78929429680 is 8692492987.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×78929429680² (a number of 23 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, 122941 + ... + 415900.

Almost surely, 2^78929429680 is an apocalyptic number.

It is an amenable number.

78929429680 is an abundant number, since it is smaller than the sum of its proper divisors (104682059504).

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

78929429680 is a wasteful number, since it uses less digits than its factorization.

78929429680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540685 (or 540679 counting only the distinct ones).

The product of its (nonzero) digits is 31352832, while the sum is 64.

The spelling of 78929429680 in words is "seventy-eight billion, nine hundred twenty-nine million, four hundred twenty-nine thousand, six hundred eighty".