77217609051 has 12 divisors (see below), whose sum is σ = 121676232600. Its totient is φ = 46798550880.

The previous prime is 77217609011. The next prime is 77217609067. The reversal of 77217609051 is 15090671277.

It is not a de Polignac number, because 77217609051 - 2²³ = 77209220443 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77217608988 and 77217609006.

It is not an unprimeable number, because it can be changed into a prime (77217609011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 389987826 + ... + 389988023.

It is an arithmetic number, because the mean of its divisors is an integer number (10139686050).

Almost surely, 2^77217609051 is an apocalyptic number.

77217609051 is a deficient number, since it is larger than the sum of its proper divisors (44458623549).

77217609051 is a wasteful number, since it uses less digits than its factorization.

77217609051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 779975866 (or 779975863 counting only the distinct ones).

The product of its (nonzero) digits is 185220, while the sum is 45.

The spelling of 77217609051 in words is "seventy-seven billion, two hundred seventeen million, six hundred nine thousand, fifty-one".