77757507380531 has 32 divisors (see below), whose sum is σ = 89431160313600. Its totient is φ = 66863030256000.

The previous prime is 77757507380507. The next prime is 77757507380543. The reversal of 77757507380531 is 13508370575777.

It is not a de Polignac number, because 77757507380531 - 2¹⁰ = 77757507379507 is a prime.

It is a super-2 number, since 2×77757507380531² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (77757507380591) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1366319705 + ... + 1366376613.

It is an arithmetic number, because the mean of its divisors is an integer number (2794723759800).

Almost surely, 2^{77757507380531} is an apocalyptic number.

77757507380531 is a deficient number, since it is larger than the sum of its proper divisors (11673652933069).

77757507380531 is a wasteful number, since it uses less digits than its factorization.

77757507380531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67091.

The product of its (nonzero) digits is 151263000, while the sum is 65.

The spelling of 77757507380531 in words is "seventy-seven trillion, seven hundred fifty-seven billion, five hundred seven million, three hundred eighty thousand, five hundred thirty-one".