16161511516123 has 2 divisors, whose sum is σ = 16161511516124. Its totient is φ = 16161511516122.

The previous prime is 16161511516067. The next prime is 16161511516219. The reversal of 16161511516123 is 32161511516161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16161511516123 - 2³⁷ = 16024072562651 is a prime.

It is a super-2 number, since 2×16161511516123² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16161511516223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8080755758061 + 8080755758062.

It is an arithmetic number, because the mean of its divisors is an integer number (8080755758062).

Almost surely, 2^{16161511516123} is an apocalyptic number.

16161511516123 is a deficient number, since it is larger than the sum of its proper divisors (1).

16161511516123 is an equidigital number, since it uses as much as digits as its factorization.

16161511516123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32400, while the sum is 40.

The spelling of 16161511516123 in words is "sixteen trillion, one hundred sixty-one billion, five hundred eleven million, five hundred sixteen thousand, one hundred twenty-three".