15971299129327 has 2 divisors, whose sum is σ = 15971299129328. Its totient is φ = 15971299129326.

The previous prime is 15971299129249. The next prime is 15971299129349. The reversal of 15971299129327 is 72392199217951.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15971299129327 - 2¹⁵ = 15971299096559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15971299129127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7985649564663 + 7985649564664.

It is an arithmetic number, because the mean of its divisors is an integer number (7985649564664).

Almost surely, 2^{15971299129327} is an apocalyptic number.

15971299129327 is a deficient number, since it is larger than the sum of its proper divisors (1).

15971299129327 is an equidigital number, since it uses as much as digits as its factorization.

15971299129327 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38578680, while the sum is 67.

The spelling of 15971299129327 in words is "fifteen trillion, nine hundred seventy-one billion, two hundred ninety-nine million, one hundred twenty-nine thousand, three hundred twenty-seven".