16725321745 has 32 divisors (see below), whose sum is σ = 22158023040. Its totient is φ = 12018240000.

The previous prime is 16725321733. The next prime is 16725321787. The reversal of 16725321745 is 54712352761.

It is a happy number.

It is not a de Polignac number, because 16725321745 - 2⁵ = 16725321713 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2891266 + ... + 2897044.

It is an arithmetic number, because the mean of its divisors is an integer number (692438220).

Almost surely, 2^16725321745 is an apocalyptic number.

It is an amenable number.

16725321745 is a deficient number, since it is larger than the sum of its proper divisors (5432701295).

16725321745 is a wasteful number, since it uses less digits than its factorization.

16725321745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6417.

The product of its digits is 352800, while the sum is 43.

The spelling of 16725321745 in words is "sixteen billion, seven hundred twenty-five million, three hundred twenty-one thousand, seven hundred forty-five".