770991937631 has 2 divisors, whose sum is σ = 770991937632. Its totient is φ = 770991937630.

The previous prime is 770991937621. The next prime is 770991937679. The reversal of 770991937631 is 136739199077.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-770991937631 is a prime.

It is a super-2 number, since 2×770991937631² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (770991937621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 385495968815 + 385495968816.

It is an arithmetic number, because the mean of its divisors is an integer number (385495968816).

Almost surely, 2^770991937631 is an apocalyptic number.

770991937631 is a deficient number, since it is larger than the sum of its proper divisors (1).

770991937631 is an equidigital number, since it uses as much as digits as its factorization.

770991937631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13502538, while the sum is 62.

The spelling of 770991937631 in words is "seven hundred seventy billion, nine hundred ninety-one million, nine hundred thirty-seven thousand, six hundred thirty-one".