16572167225 has 6 divisors (see below), whose sum is σ = 20549487390. Its totient is φ = 13257733760.

The previous prime is 16572167219. The next prime is 16572167243. The reversal of 16572167225 is 52276127561.

It can be written as a sum of positive squares in 3 ways, for example, as 1550233129 + 15021934096 = 39373^2 + 122564^2 .

It is not a de Polignac number, because 16572167225 - 2⁸ = 16572166969 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 331443320 + ... + 331443369.

It is an arithmetic number, because the mean of its divisors is an integer number (3424914565).

Almost surely, 2^16572167225 is an apocalyptic number.

It is an amenable number.

16572167225 is a deficient number, since it is larger than the sum of its proper divisors (3977320165).

16572167225 is an equidigital number, since it uses as much as digits as its factorization.

16572167225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662886699 (or 662886694 counting only the distinct ones).

The product of its digits is 352800, while the sum is 44.

The spelling of 16572167225 in words is "sixteen billion, five hundred seventy-two million, one hundred sixty-seven thousand, two hundred twenty-five".