16685016758425 has 24 divisors (see below), whose sum is σ = 21922542137592. Its totient is φ = 12553605120000.

The previous prime is 16685016758407. The next prime is 16685016758437. The reversal of 16685016758425 is 52485761058661.

It can be written as a sum of positive squares in 12 ways, for example, as 5261752410201 + 11423264348224 = 2293851^2 + 3379832^2 .

It is not a de Polignac number, because 16685016758425 - 2²⁹ = 16684479887513 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13844376 + ... + 15001225.

It is an arithmetic number, because the mean of its divisors is an integer number (913439255733).

Almost surely, 2^{16685016758425} is an apocalyptic number.

It is an amenable number.

16685016758425 is a deficient number, since it is larger than the sum of its proper divisors (5237525379167).

16685016758425 is a wasteful number, since it uses less digits than its factorization.

16685016758425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28846989 (or 28846984 counting only the distinct ones).

The product of its (nonzero) digits is 96768000, while the sum is 64.

The spelling of 16685016758425 in words is "sixteen trillion, six hundred eighty-five billion, sixteen million, seven hundred fifty-eight thousand, four hundred twenty-five".