138174769631 has 2 divisors, whose sum is σ = 138174769632. Its totient is φ = 138174769630.

The previous prime is 138174769627. The next prime is 138174769661. The reversal of 138174769631 is 136967471831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138174769631 - 2² = 138174769627 is a prime.

It is a super-2 number, since 2×138174769631² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138174769661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69087384815 + 69087384816.

It is an arithmetic number, because the mean of its divisors is an integer number (69087384816).

Almost surely, 2^138174769631 is an apocalyptic number.

138174769631 is a deficient number, since it is larger than the sum of its proper divisors (1).

138174769631 is an equidigital number, since it uses as much as digits as its factorization.

138174769631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4572288, while the sum is 56.

The spelling of 138174769631 in words is "one hundred thirty-eight billion, one hundred seventy-four million, seven hundred sixty-nine thousand, six hundred thirty-one".