77072506689 has 16 divisors (see below), whose sum is σ = 103154184000. Its totient is φ = 51186533376.

The previous prime is 77072506681. The next prime is 77072506691. The reversal of 77072506689 is 98660527077.

It is not a de Polignac number, because 77072506689 - 2³ = 77072506681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77072506681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1076202 + ... + 1145580.

It is an arithmetic number, because the mean of its divisors is an integer number (6447136500).

Almost surely, 2^77072506689 is an apocalyptic number.

It is an amenable number.

77072506689 is a deficient number, since it is larger than the sum of its proper divisors (26081677311).

77072506689 is a wasteful number, since it uses less digits than its factorization.

77072506689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70784.

The product of its (nonzero) digits is 8890560, while the sum is 57.

The spelling of 77072506689 in words is "seventy-seven billion, seventy-two million, five hundred six thousand, six hundred eighty-nine".