161362701631 has 2 divisors, whose sum is σ = 161362701632. Its totient is φ = 161362701630.

The previous prime is 161362701571. The next prime is 161362701701. The reversal of 161362701631 is 136107263161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161362701631 - 2⁷ = 161362701503 is a prime.

It is a super-2 number, since 2×161362701631² (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 (161362701131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80681350815 + 80681350816.

It is an arithmetic number, because the mean of its divisors is an integer number (80681350816).

Almost surely, 2^161362701631 is an apocalyptic number.

161362701631 is a deficient number, since it is larger than the sum of its proper divisors (1).

161362701631 is an equidigital number, since it uses as much as digits as its factorization.

161362701631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 37.

Adding to 161362701631 its reverse (136107263161), we get a palindrome (297469964792).

The spelling of 161362701631 in words is "one hundred sixty-one billion, three hundred sixty-two million, seven hundred one thousand, six hundred thirty-one".