772864285631 has 4 divisors (see below), whose sum is σ = 775502047992. Its totient is φ = 770226523272.

The previous prime is 772864285607. The next prime is 772864285639. The reversal of 772864285631 is 136582468277.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 136582468277 = 61 ⋅2239056857.

It is a cyclic number.

It is not a de Polignac number, because 772864285631 - 2²² = 772860091327 is a prime.

It is a super-2 number, since 2×772864285631² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (772864285639) 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, 1318880741 + ... + 1318881326.

It is an arithmetic number, because the mean of its divisors is an integer number (193875511998).

Almost surely, 2^772864285631 is an apocalyptic number.

772864285631 is a deficient number, since it is larger than the sum of its proper divisors (2637762361).

772864285631 is a wasteful number, since it uses less digits than its factorization.

772864285631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2637762360.

The product of its digits is 27095040, while the sum is 59.

The spelling of 772864285631 in words is "seven hundred seventy-two billion, eight hundred sixty-four million, two hundred eighty-five thousand, six hundred thirty-one".