16164551957 has 2 divisors, whose sum is σ = 16164551958. Its totient is φ = 16164551956.

The previous prime is 16164551941. The next prime is 16164551981. The reversal of 16164551957 is 75915546161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16127476036 + 37075921 = 126994^2 + 6089^2 .

It is a cyclic number.

It is not a de Polignac number, because 16164551957 - 2⁴ = 16164551941 is a prime.

It is a super-2 number, since 2×16164551957² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16164521957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8082275978 + 8082275979.

It is an arithmetic number, because the mean of its divisors is an integer number (8082275979).

Almost surely, 2^16164551957 is an apocalyptic number.

It is an amenable number.

16164551957 is a deficient number, since it is larger than the sum of its proper divisors (1).

16164551957 is an equidigital number, since it uses as much as digits as its factorization.

16164551957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1134000, while the sum is 50.

The spelling of 16164551957 in words is "sixteen billion, one hundred sixty-four million, five hundred fifty-one thousand, nine hundred fifty-seven".