123254807687161 has 2 divisors, whose sum is σ = 123254807687162. Its totient is φ = 123254807687160.

The previous prime is 123254807687119. The next prime is 123254807687171. The reversal of 123254807687161 is 161786708452321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74584036802025 + 48670770885136 = 8636205^2 + 6976444^2 .

It is a cyclic number.

It is not a de Polignac number, because 123254807687161 - 2¹⁵ = 123254807654393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123254807687161.

It is not a weakly prime, because it can be changed into another prime (123254807687171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61627403843580 + 61627403843581.

It is an arithmetic number, because the mean of its divisors is an integer number (61627403843581).

Almost surely, 2^{123254807687161} is an apocalyptic number.

It is an amenable number.

123254807687161 is a deficient number, since it is larger than the sum of its proper divisors (1).

123254807687161 is an equidigital number, since it uses as much as digits as its factorization.

123254807687161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27095040, while the sum is 61.

The spelling of 123254807687161 in words is "one hundred twenty-three trillion, two hundred fifty-four billion, eight hundred seven million, six hundred eighty-seven thousand, one hundred sixty-one".