16531925817651 has 32 divisors (see below), whose sum is σ = 22264047133440. Its totient is φ = 10911092252544.

The previous prime is 16531925817623. The next prime is 16531925817653. The reversal of 16531925817651 is 15671852913561.

It is not a de Polignac number, because 16531925817651 - 2¹⁴ = 16531925801267 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16531925817653) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 554394220 + ... + 554424038.

It is an arithmetic number, because the mean of its divisors is an integer number (695751472920).

Almost surely, 2^{16531925817651} is an apocalyptic number.

16531925817651 is a deficient number, since it is larger than the sum of its proper divisors (5732121315789).

16531925817651 is a wasteful number, since it uses less digits than its factorization.

16531925817651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34355.

The product of its digits is 13608000, while the sum is 60.

The spelling of 16531925817651 in words is "sixteen trillion, five hundred thirty-one billion, nine hundred twenty-five million, eight hundred seventeen thousand, six hundred fifty-one".