15797892985957 has 2 divisors, whose sum is σ = 15797892985958. Its totient is φ = 15797892985956.

The previous prime is 15797892985949. The next prime is 15797892986003. The reversal of 15797892985957 is 75958929879751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14831733737601 + 966159248356 = 3851199^2 + 982934^2 .

It is a cyclic number.

It is not a de Polignac number, because 15797892985957 - 2³ = 15797892985949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15797892985157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7898946492978 + 7898946492979.

It is an arithmetic number, because the mean of its divisors is an integer number (7898946492979).

Almost surely, 2^{15797892985957} is an apocalyptic number.

It is an amenable number.

15797892985957 is a deficient number, since it is larger than the sum of its proper divisors (1).

15797892985957 is an equidigital number, since it uses as much as digits as its factorization.

15797892985957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36006768000, while the sum is 91.

The spelling of 15797892985957 in words is "fifteen trillion, seven hundred ninety-seven billion, eight hundred ninety-two million, nine hundred eighty-five thousand, nine hundred fifty-seven".