16231231957 has 2 divisors, whose sum is σ = 16231231958. Its totient is φ = 16231231956.

The previous prime is 16231231921. The next prime is 16231232023. The reversal of 16231231957 is 75913213261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16231014801 + 217156 = 127401^2 + 466^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16231231957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16231231057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8115615978 + 8115615979.

It is an arithmetic number, because the mean of its divisors is an integer number (8115615979).

Almost surely, 2^16231231957 is an apocalyptic number.

It is an amenable number.

16231231957 is a deficient number, since it is larger than the sum of its proper divisors (1).

16231231957 is an equidigital number, since it uses as much as digits as its factorization.

16231231957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68040, while the sum is 40.

The spelling of 16231231957 in words is "sixteen billion, two hundred thirty-one million, two hundred thirty-one thousand, nine hundred fifty-seven".