2251664156 has 96 divisors (see below), whose sum is σ = 4772984832. Its totient is φ = 909342720.

The previous prime is 2251664131. The next prime is 2251664209. The reversal of 2251664156 is 6514661522.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6378476 + ... + 6378828.

It is an arithmetic number, because the mean of its divisors is an integer number (49718592).

Almost surely, 2^2251664156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2251664156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2386492416).

2251664156 is an abundant number, since it is smaller than the sum of its proper divisors (2521320676).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2251664156 is a wasteful number, since it uses less digits than its factorization.

2251664156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579 (or 577 counting only the distinct ones).

The product of its digits is 86400, while the sum is 38.

The square root of 2251664156 is about 47451.7034046197. The cubic root of 2251664156 is about 1310.6936784163.

The spelling of 2251664156 in words is "two billion, two hundred fifty-one million, six hundred sixty-four thousand, one hundred fifty-six".