16161101657 has 2 divisors, whose sum is σ = 16161101658. Its totient is φ = 16161101656.

The previous prime is 16161101611. The next prime is 16161101659. The reversal of 16161101657 is 75610116161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9013413721 + 7147687936 = 94939^2 + 84544^2 .

It is a cyclic number.

It is not a de Polignac number, because 16161101657 - 2²⁰ = 16160053081 is a prime.

It is a super-2 number, since 2×16161101657² (a number of 21 digits) contains 22 as substring.

Together with 16161101659, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16161101659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8080550828 + 8080550829.

It is an arithmetic number, because the mean of its divisors is an integer number (8080550829).

Almost surely, 2^16161101657 is an apocalyptic number.

It is an amenable number.

16161101657 is a deficient number, since it is larger than the sum of its proper divisors (1).

16161101657 is an equidigital number, since it uses as much as digits as its factorization.

16161101657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 35.

The spelling of 16161101657 in words is "sixteen billion, one hundred sixty-one million, one hundred one thousand, six hundred fifty-seven".