15961357607247 has 64 divisors (see below), whose sum is σ = 26848187161600. Its totient is φ = 9290657335680.

The previous prime is 15961357607219. The next prime is 15961357607287. The reversal of 15961357607247 is 74270675316951.

15961357607247 is a `hidden beast` number, since 1 + 5 + 9 + 6 + 13 + 5 + 7 + 607 + 2 + 4 + 7 = 666.

It is not a de Polignac number, because 15961357607247 - 2¹⁰ = 15961357606223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15961357607287) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2311653 + ... + 6104625.

It is an arithmetic number, because the mean of its divisors is an integer number (419502924400).

Almost surely, 2^{15961357607247} is an apocalyptic number.

15961357607247 is a deficient number, since it is larger than the sum of its proper divisors (10886829554353).

15961357607247 is a wasteful number, since it uses less digits than its factorization.

15961357607247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3793645 (or 3793639 counting only the distinct ones).

The product of its (nonzero) digits is 66679200, while the sum is 63.

The spelling of 15961357607247 in words is "fifteen trillion, nine hundred sixty-one billion, three hundred fifty-seven million, six hundred seven thousand, two hundred forty-seven".