438838677631 has 2 divisors, whose sum is σ = 438838677632. Its totient is φ = 438838677630.

The previous prime is 438838677617. The next prime is 438838677653. The reversal of 438838677631 is 136776838834.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-438838677631 is a prime.

It is a super-2 number, since 2×438838677631² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (438838677691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219419338815 + 219419338816.

It is an arithmetic number, because the mean of its divisors is an integer number (219419338816).

Almost surely, 2^438838677631 is an apocalyptic number.

438838677631 is a deficient number, since it is larger than the sum of its proper divisors (1).

438838677631 is an equidigital number, since it uses as much as digits as its factorization.

438838677631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 97542144, while the sum is 64.

The spelling of 438838677631 in words is "four hundred thirty-eight billion, eight hundred thirty-eight million, six hundred seventy-seven thousand, six hundred thirty-one".