16732172225 has 12 divisors (see below), whose sum is σ = 21968358444. Its totient is φ = 12598341120.

The previous prime is 16732172213. The next prime is 16732172231. The reversal of 16732172225 is 52227123761.

It can be written as a sum of positive squares in 6 ways, for example, as 134745664 + 16597426561 = 11608^2 + 128831^2 .

It is not a de Polignac number, because 16732172225 - 2⁴ = 16732172209 is a prime.

It is a super-2 number, since 2×16732172225² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19684484 + ... + 19685333.

It is an arithmetic number, because the mean of its divisors is an integer number (1830696537).

Almost surely, 2^16732172225 is an apocalyptic number.

It is an amenable number.

16732172225 is a deficient number, since it is larger than the sum of its proper divisors (5236186219).

16732172225 is a wasteful number, since it uses less digits than its factorization.

16732172225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39369844 (or 39369839 counting only the distinct ones).

The product of its digits is 70560, while the sum is 38.

Adding to 16732172225 its reverse (52227123761), we get a palindrome (68959295986).

The spelling of 16732172225 in words is "sixteen billion, seven hundred thirty-two million, one hundred seventy-two thousand, two hundred twenty-five".