156644225 has 12 divisors (see below), whose sum is σ = 200937660. Its totient is φ = 120993600.

The previous prime is 156644219. The next prime is 156644249. The reversal of 156644225 is 522446651.

It can be written as a sum of positive squares in 6 ways, for example, as 7974976 + 148669249 = 2824^2 + 12193^2 .

It is a de Polignac number, because none of the positive numbers 2^k-156644225 is a prime.

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, 107306 + ... + 108755.

It is an arithmetic number, because the mean of its divisors is an integer number (16744805).

Almost surely, 2^156644225 is an apocalyptic number.

It is an amenable number.

156644225 is a deficient number, since it is larger than the sum of its proper divisors (44293435).

156644225 is a wasteful number, since it uses less digits than its factorization.

156644225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216100 (or 216095 counting only the distinct ones).

The product of its digits is 57600, while the sum is 35.

The square root of 156644225 is about 12515.7590660735. The cubic root of 156644225 is about 539.0612691563.

The spelling of 156644225 in words is "one hundred fifty-six million, six hundred forty-four thousand, two hundred twenty-five".