77908830531 has 8 divisors (see below), whose sum is σ = 118718217984. Its totient is φ = 44519331720.

The previous prime is 77908830491. The next prime is 77908830541. The reversal of 77908830531 is 13503880977.

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

It is not a de Polignac number, because 77908830531 - 2⁹ = 77908830019 is a prime.

It is a super-2 number, since 2×77908830531² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (77908830541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1854972135 + ... + 1854972176.

It is an arithmetic number, because the mean of its divisors is an integer number (14839777248).

Almost surely, 2^77908830531 is an apocalyptic number.

77908830531 is a deficient number, since it is larger than the sum of its proper divisors (40809387453).

77908830531 is a wasteful number, since it uses less digits than its factorization.

77908830531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3709944321.

The product of its (nonzero) digits is 1270080, while the sum is 51.

The spelling of 77908830531 in words is "seventy-seven billion, nine hundred eight million, eight hundred thirty thousand, five hundred thirty-one".