16161680123 has 4 divisors (see below), whose sum is σ = 16328295480. Its totient is φ = 15995064768.

The previous prime is 16161680099. The next prime is 16161680177. The reversal of 16161680123 is 32108616161.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16161680123 - 2²⁰ = 16160631547 is a prime.

It is a super-2 number, since 2×16161680123² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16161640123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83307533 + ... + 83307726.

It is an arithmetic number, because the mean of its divisors is an integer number (4082073870).

Almost surely, 2^16161680123 is an apocalyptic number.

16161680123 is a deficient number, since it is larger than the sum of its proper divisors (166615357).

16161680123 is an equidigital number, since it uses as much as digits as its factorization.

16161680123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166615356.

The product of its (nonzero) digits is 10368, while the sum is 35.

The spelling of 16161680123 in words is "sixteen billion, one hundred sixty-one million, six hundred eighty thousand, one hundred twenty-three".