77136928997 has 4 divisors (see below), whose sum is σ = 77540787456. Its totient is φ = 76733070540.

The previous prime is 77136928991. The next prime is 77136929047. The reversal of 77136928997 is 79982963177.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 77136928997 - 2²⁴ = 77120151781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77136928991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 201928943 + ... + 201929324.

It is an arithmetic number, because the mean of its divisors is an integer number (19385196864).

Almost surely, 2^77136928997 is an apocalyptic number.

It is an amenable number.

77136928997 is a deficient number, since it is larger than the sum of its proper divisors (403858459).

77136928997 is a wasteful number, since it uses less digits than its factorization.

77136928997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403858458.

The product of its digits is 72013536, while the sum is 68.

The spelling of 77136928997 in words is "seventy-seven billion, one hundred thirty-six million, nine hundred twenty-eight thousand, nine hundred ninety-seven".