76991156 has 24 divisors (see below), whose sum is σ = 150405024. Its totient is φ = 34181280.

The previous prime is 76991137. The next prime is 76991171. The reversal of 76991156 is 65119967.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18455 + ... + 22238.

It is an arithmetic number, because the mean of its divisors is an integer number (6266876).

Almost surely, 2^76991156 is an apocalyptic number.

It is an amenable number.

76991156 is a deficient number, since it is larger than the sum of its proper divisors (73413868).

76991156 is a wasteful number, since it uses less digits than its factorization.

76991156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40751 (or 40749 counting only the distinct ones).

The product of its digits is 102060, while the sum is 44.

The square root of 76991156 is about 8774.4604392521. The cubic root of 76991156 is about 425.4157979166.

It can be divided in two parts, 769911 and 56, that added together give a palindrome (769967).

The spelling of 76991156 in words is "seventy-six million, nine hundred ninety-one thousand, one hundred fifty-six".