76689788531 has 4 divisors (see below), whose sum is σ = 77033689152. Its totient is φ = 76345887912.

The previous prime is 76689788507. The next prime is 76689788551. The reversal of 76689788531 is 13588798667.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-76689788531 is a prime.

It is a super-2 number, since 2×76689788531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76689788551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171949976 + ... + 171950421.

It is an arithmetic number, because the mean of its divisors is an integer number (19258422288).

Almost surely, 2^76689788531 is an apocalyptic number.

76689788531 is a deficient number, since it is larger than the sum of its proper divisors (343900621).

76689788531 is a wasteful number, since it uses less digits than its factorization.

76689788531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343900620.

The product of its digits is 121927680, while the sum is 68.

The spelling of 76689788531 in words is "seventy-six billion, six hundred eighty-nine million, seven hundred eighty-eight thousand, five hundred thirty-one".