16116632225 has 6 divisors (see below), whose sum is σ = 19984623990. Its totient is φ = 12893305760.

The previous prime is 16116632137. The next prime is 16116632249. The reversal of 16116632225 is 52223661161.

It can be written as a sum of positive squares in 3 ways, for example, as 2207496256 + 13909135969 = 46984^2 + 117937^2 .

It is not a de Polignac number, because 16116632225 - 2⁸ = 16116631969 is a prime.

It is a Curzon number.

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, 322332620 + ... + 322332669.

It is an arithmetic number, because the mean of its divisors is an integer number (3330770665).

Almost surely, 2^16116632225 is an apocalyptic number.

It is an amenable number.

16116632225 is a deficient number, since it is larger than the sum of its proper divisors (3867991765).

16116632225 is an equidigital number, since it uses as much as digits as its factorization.

16116632225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644665299 (or 644665294 counting only the distinct ones).

The product of its digits is 25920, while the sum is 35.

It can be divided in two parts, 161166 and 32225, that added together give a palindrome (193391).

The spelling of 16116632225 in words is "sixteen billion, one hundred sixteen million, six hundred thirty-two thousand, two hundred twenty-five".