77731758427808 has 24 divisors (see below), whose sum is σ = 153353886698880. Its totient is φ = 38784739583680.

The previous prime is 77731758427789. The next prime is 77731758427831. The reversal of 77731758427808 is 80872485713777.

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, 2535597878 + ... + 2535628533.

It is an arithmetic number, because the mean of its divisors is an integer number (6389745279120).

Almost surely, 2^{77731758427808} is an apocalyptic number.

It is an amenable number.

77731758427808 is a deficient number, since it is larger than the sum of its proper divisors (75622128271072).

77731758427808 is a wasteful number, since it uses less digits than its factorization.

77731758427808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5071226900 (or 5071226892 counting only the distinct ones).

The product of its (nonzero) digits is 1032622080, while the sum is 74.

The spelling of 77731758427808 in words is "seventy-seven trillion, seven hundred thirty-one billion, seven hundred fifty-eight million, four hundred twenty-seven thousand, eight hundred eight".