2156555610 has 256 divisors, whose sum is σ = 6602342400. Its totient is φ = 496108800.

The previous prime is 2156555603. The next prime is 2156555617. The reversal of 2156555610 is 165556512.

It is an interprime number because it is at equal distance from previous prime (2156555603) and next prime (2156555617).

It is not an unprimeable number, because it can be changed into a prime (2156555617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 5431932 + ... + 5432328.

It is an arithmetic number, because the mean of its divisors is an integer number (25790400).

Almost surely, 2^2156555610 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2156555610, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3301171200).

2156555610 is an abundant number, since it is smaller than the sum of its proper divisors (4445786790).

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

2156555610 is a wasteful number, since it uses less digits than its factorization.

2156555610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514 (or 508 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 36.

The square root of 2156555610 is about 46438.7296337874. The cubic root of 2156555610 is about 1291.9733453878.

The spelling of 2156555610 in words is "two billion, one hundred fifty-six million, five hundred fifty-five thousand, six hundred ten".