77613031677 has 4 divisors (see below), whose sum is σ = 103484042240. Its totient is φ = 51742021116.

The previous prime is 77613031669. The next prime is 77613031687.

77613031677 is nontrivially palindromic in base 10.

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 not a de Polignac number, because 77613031677 - 2³ = 77613031669 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 (77613031687) 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, 12935505277 + ... + 12935505282.

It is an arithmetic number, because the mean of its divisors is an integer number (25871010560).

Almost surely, 2^77613031677 is an apocalyptic number.

It is an amenable number.

77613031677 is a deficient number, since it is larger than the sum of its proper divisors (25871010563).

77613031677 is a wasteful number, since it uses less digits than its factorization.

77613031677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25871010562.

The product of its (nonzero) digits is 777924, while the sum is 48.

The spelling of 77613031677 in words is "seventy-seven billion, six hundred thirteen million, thirty-one thousand, six hundred seventy-seven".