77993397952 has 56 divisors (see below), whose sum is σ = 155912409536. Its totient is φ = 38708990208.

The previous prime is 77993397899. The next prime is 77993397971. The reversal of 77993397952 is 25979339977.

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, 9207223 + ... + 9215689.

Almost surely, 2^77993397952 is an apocalyptic number.

It is an amenable number.

77993397952 is a deficient number, since it is larger than the sum of its proper divisors (77919011584).

77993397952 is a wasteful number, since it uses less digits than its factorization.

77993397952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9525 (or 9515 counting only the distinct ones).

The product of its digits is 202538070, while the sum is 70.

The spelling of 77993397952 in words is "seventy-seven billion, nine hundred ninety-three million, three hundred ninety-seven thousand, nine hundred fifty-two".