2251664345156 has 12 divisors (see below), whose sum is σ = 3940489570668. Its totient is φ = 1125810182112.

The previous prime is 2251664345143. The next prime is 2251664345179. The reversal of 2251664345156 is 6515434661522.

It can be written as a sum of positive squares in 2 ways, for example, as 2219474244100 + 32190101056 = 1489790^2 + 179416^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5266151 + ... + 5677646.

It is an arithmetic number, because the mean of its divisors is an integer number (328374130889).

Almost surely, 2^{2251664345156} is an apocalyptic number.

It is an amenable number.

2251664345156 is a deficient number, since it is larger than the sum of its proper divisors (1688825225512).

2251664345156 is a wasteful number, since it uses less digits than its factorization.

2251664345156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10995238 (or 10995236 counting only the distinct ones).

The product of its digits is 5184000, while the sum is 50.

The spelling of 2251664345156 in words is "two trillion, two hundred fifty-one billion, six hundred sixty-four million, three hundred forty-five thousand, one hundred fifty-six".