16312645631 has 2 divisors, whose sum is σ = 16312645632. Its totient is φ = 16312645630.

The previous prime is 16312645561. The next prime is 16312645639. The reversal of 16312645631 is 13654621361.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16312645631 - 2¹⁴ = 16312629247 is a prime.

It is a super-2 number, since 2×16312645631² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16312645639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8156322815 + 8156322816.

It is an arithmetic number, because the mean of its divisors is an integer number (8156322816).

Almost surely, 2^16312645631 is an apocalyptic number.

16312645631 is a deficient number, since it is larger than the sum of its proper divisors (1).

16312645631 is an equidigital number, since it uses as much as digits as its factorization.

16312645631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 38.

The spelling of 16312645631 in words is "sixteen billion, three hundred twelve million, six hundred forty-five thousand, six hundred thirty-one".