77837058961 has 4 divisors (see below), whose sum is σ = 77973376624. Its totient is φ = 77700741300.

The previous prime is 77837058941. The next prime is 77837058997. The reversal of 77837058961 is 16985073877.

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 a de Polignac number, because none of the positive numbers 2^k-77837058961 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77837058961.

It is not an unprimeable number, because it can be changed into a prime (77837058941) 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, 68157975 + ... + 68159116.

It is an arithmetic number, because the mean of its divisors is an integer number (19493344156).

Almost surely, 2^77837058961 is an apocalyptic number.

It is an amenable number.

77837058961 is a deficient number, since it is larger than the sum of its proper divisors (136317663).

77837058961 is a wasteful number, since it uses less digits than its factorization.

77837058961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136317662.

The product of its (nonzero) digits is 17781120, while the sum is 61.

The spelling of 77837058961 in words is "seventy-seven billion, eight hundred thirty-seven million, fifty-eight thousand, nine hundred sixty-one".