15639485993057 has 2 divisors, whose sum is σ = 15639485993058. Its totient is φ = 15639485993056.

The previous prime is 15639485993029. The next prime is 15639485993059. The reversal of 15639485993057 is 75039958493651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15639485993041 + 16 = 3954679^2 + 4^2 .

It is a cyclic number.

It is not a de Polignac number, because 15639485993057 - 2¹⁰ = 15639485992033 is a prime.

Together with 15639485993059, 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 (15639485993059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7819742996528 + 7819742996529.

It is an arithmetic number, because the mean of its divisors is an integer number (7819742996529).

Almost surely, 2^{15639485993057} is an apocalyptic number.

It is an amenable number.

15639485993057 is a deficient number, since it is larger than the sum of its proper divisors (1).

15639485993057 is an equidigital number, since it uses as much as digits as its factorization.

15639485993057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1102248000, while the sum is 74.

The spelling of 15639485993057 in words is "fifteen trillion, six hundred thirty-nine billion, four hundred eighty-five million, nine hundred ninety-three thousand, fifty-seven".