726669297631 has 2 divisors, whose sum is σ = 726669297632. Its totient is φ = 726669297630.

The previous prime is 726669297619. The next prime is 726669297659. The reversal of 726669297631 is 136792966627.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 726669297631 - 2⁷ = 726669297503 is a prime.

It is a super-2 number, since 2×726669297631² (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 (726669297691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363334648815 + 363334648816.

It is an arithmetic number, because the mean of its divisors is an integer number (363334648816).

Almost surely, 2^726669297631 is an apocalyptic number.

726669297631 is a deficient number, since it is larger than the sum of its proper divisors (1).

726669297631 is an equidigital number, since it uses as much as digits as its factorization.

726669297631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 61725888, while the sum is 64.

The spelling of 726669297631 in words is "seven hundred twenty-six billion, six hundred sixty-nine million, two hundred ninety-seven thousand, six hundred thirty-one".