161629356631 has 2 divisors, whose sum is σ = 161629356632. Its totient is φ = 161629356630.

The previous prime is 161629356599. The next prime is 161629356641. The reversal of 161629356631 is 136653926161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161629356631 - 2⁵ = 161629356599 is a prime.

It is a super-2 number, since 2×161629356631² (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 (161629356641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80814678315 + 80814678316.

It is an arithmetic number, because the mean of its divisors is an integer number (80814678316).

Almost surely, 2^161629356631 is an apocalyptic number.

161629356631 is a deficient number, since it is larger than the sum of its proper divisors (1).

161629356631 is an equidigital number, since it uses as much as digits as its factorization.

161629356631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1049760, while the sum is 49.

The spelling of 161629356631 in words is "one hundred sixty-one billion, six hundred twenty-nine million, three hundred fifty-six thousand, six hundred thirty-one".