16961155225 has 45 divisors (see below), whose sum is σ = 24873361035. Its totient is φ = 11439842400.

The previous prime is 16961155217. The next prime is 16961155249. The reversal of 16961155225 is 52255116961.

It is a happy number.

The square root of 16961155225 is 130235.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 7 ways, for example, as 12104180361 + 4856974864 = 110019^2 + 69692^2 .

It is not a de Polignac number, because 16961155225 - 2³ = 16961155217 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 278051695 + ... + 278051755.

Almost surely, 2^16961155225 is an apocalyptic number.

16961155225 is the 130235-th square number.

16961155225 is the 65118-th centered octagonal number.

It is an amenable number.

16961155225 is a deficient number, since it is larger than the sum of its proper divisors (7912205810).

16961155225 is an frugal number, since it uses more digits than its factorization.

16961155225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268 (or 73 counting only the distinct ones).

The product of its digits is 162000, while the sum is 43.

The spelling of 16961155225 in words is "sixteen billion, nine hundred sixty-one million, one hundred fifty-five thousand, two hundred twenty-five".