768764624531 has 4 divisors (see below), whose sum is σ = 768900622512. Its totient is φ = 768628626552.

The previous prime is 768764624473. The next prime is 768764624591. The reversal of 768764624531 is 135426467867.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 135426467867 = 6311 ⋅21458797.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-768764624531 is a prime.

It is a super-2 number, since 2×768764624531² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (768764624591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67990511 + ... + 68001816.

It is an arithmetic number, because the mean of its divisors is an integer number (192225155628).

Almost surely, 2^768764624531 is an apocalyptic number.

768764624531 is a deficient number, since it is larger than the sum of its proper divisors (135997981).

768764624531 is a wasteful number, since it uses less digits than its factorization.

768764624531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135997980.

The product of its digits is 40642560, while the sum is 59.

It can be divided in two parts, 7687646 and 24531, that added together give a palindrome (7712177).

The spelling of 768764624531 in words is "seven hundred sixty-eight billion, seven hundred sixty-four million, six hundred twenty-four thousand, five hundred thirty-one".