18649371076631 has 2 divisors, whose sum is σ = 18649371076632. Its totient is φ = 18649371076630.

The previous prime is 18649371076597. The next prime is 18649371076657. The reversal of 18649371076631 is 13667017394681.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18649371076631 - 2¹⁰ = 18649371075607 is a prime.

It is a super-2 number, since 2×18649371076631² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18649371076681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9324685538315 + 9324685538316.

It is an arithmetic number, because the mean of its divisors is an integer number (9324685538316).

Almost surely, 2^{18649371076631} is an apocalyptic number.

18649371076631 is a deficient number, since it is larger than the sum of its proper divisors (1).

18649371076631 is an equidigital number, since it uses as much as digits as its factorization.

18649371076631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27433728, while the sum is 62.

The spelling of 18649371076631 in words is "eighteen trillion, six hundred forty-nine billion, three hundred seventy-one million, seventy-six thousand, six hundred thirty-one".