16514125721 has 8 divisors (see below), whose sum is σ = 16627905024. Its totient is φ = 16400404800.

The previous prime is 16514125717. The next prime is 16514125729. The reversal of 16514125721 is 12752141561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16514125721 - 2² = 16514125717 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16514125729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 659201 + ... + 683793.

It is an arithmetic number, because the mean of its divisors is an integer number (2078488128).

Almost surely, 2^16514125721 is an apocalyptic number.

It is an amenable number.

16514125721 is a deficient number, since it is larger than the sum of its proper divisors (113779303).

16514125721 is a wasteful number, since it uses less digits than its factorization.

16514125721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29191.

The product of its digits is 16800, while the sum is 35.

The spelling of 16514125721 in words is "sixteen billion, five hundred fourteen million, one hundred twenty-five thousand, seven hundred twenty-one".