2156432325564 has 96 divisors (see below), whose sum is σ = 5561379532800. Its totient is φ = 644868020160.

The previous prime is 2156432325533. The next prime is 2156432325583. The reversal of 2156432325564 is 4655232346512.

It is a super-2 number, since 2×2156432325564² (a number of 25 digits) contains 22 as substring.

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, 21086547 + ... + 21188565.

It is an arithmetic number, because the mean of its divisors is an integer number (57931036800).

Almost surely, 2^{2156432325564} 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 2156432325564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2780689766400).

2156432325564 is an abundant number, since it is smaller than the sum of its proper divisors (3404947207236).

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

2156432325564 is a wasteful number, since it uses less digits than its factorization.

2156432325564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104143 (or 104141 counting only the distinct ones).

The product of its digits is 5184000, while the sum is 48.

The spelling of 2156432325564 in words is "two trillion, one hundred fifty-six billion, four hundred thirty-two million, three hundred twenty-five thousand, five hundred sixty-four".