77911011977 has 8 divisors (see below), whose sum is σ = 78310464000. Its totient is φ = 77511639744.

The previous prime is 77911011967. The next prime is 77911012007.

It is a happy number.

77911011977 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77911011977 - 2²⁰ = 77909963401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77911011967) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3628808 + ... + 3650214.

It is an arithmetic number, because the mean of its divisors is an integer number (9788808000).

Almost surely, 2^77911011977 is an apocalyptic number.

It is an amenable number.

77911011977 is a deficient number, since it is larger than the sum of its proper divisors (399452023).

77911011977 is a wasteful number, since it uses less digits than its factorization.

77911011977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39895.

The product of its (nonzero) digits is 194481, while the sum is 50.

The spelling of 77911011977 in words is "seventy-seven billion, nine hundred eleven million, eleven thousand, nine hundred seventy-seven".