2160621456 has 80 divisors (see below), whose sum is σ = 6444837504. Its totient is φ = 610947072.

The previous prime is 2160621431. The next prime is 2160621457. The reversal of 2160621456 is 6541260612.

It is a super-2 number, since 2×2160621456² = 9336570152255119872, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2160621457) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 555 + ... + 65738.

Almost surely, 2^2160621456 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 2160621456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3222418752).

2160621456 is an abundant number, since it is smaller than the sum of its proper divisors (4284216048).

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

2160621456 is a wasteful number, since it uses less digits than its factorization.

2160621456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66408 (or 66402 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 2160621456 is about 46482.4854757144. The cubic root of 2160621456 is about 1292.7847730915.

The spelling of 2160621456 in words is "two billion, one hundred sixty million, six hundred twenty-one thousand, four hundred fifty-six".