161932054931 has 2 divisors, whose sum is σ = 161932054932. Its totient is φ = 161932054930.

The previous prime is 161932054903. The next prime is 161932054943. The reversal of 161932054931 is 139450239161.

It is a strong prime.

It is an emirp because it is prime and its reverse (139450239161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161932054931 - 2¹⁴ = 161932038547 is a prime.

It is a super-2 number, since 2×161932054931² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (161932054631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80966027465 + 80966027466.

It is an arithmetic number, because the mean of its divisors is an integer number (80966027466).

Almost surely, 2^161932054931 is an apocalyptic number.

161932054931 is a deficient number, since it is larger than the sum of its proper divisors (1).

161932054931 is an equidigital number, since it uses as much as digits as its factorization.

161932054931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 174960, while the sum is 44.

The spelling of 161932054931 in words is "one hundred sixty-one billion, nine hundred thirty-two million, fifty-four thousand, nine hundred thirty-one".