2156351418 has 48 divisors (see below), whose sum is σ = 5057934336. Its totient is φ = 660005280.

The previous prime is 2156351389. The next prime is 2156351429. The reversal of 2156351418 is 8141536512.

2156351418 is a `hidden beast` number, since 2 + 1 + 5 + 635 + 1 + 4 + 18 = 666.

It is a super-2 number, since 2×2156351418² = 9299702875821221448, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20571 + ... + 68817.

It is an arithmetic number, because the mean of its divisors is an integer number (105373632).

Almost surely, 2^2156351418 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2156351418, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2528967168).

2156351418 is an abundant number, since it is smaller than the sum of its proper divisors (2901582918).

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

2156351418 is a wasteful number, since it uses less digits than its factorization.

2156351418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48459 (or 48456 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 2156351418 is about 46436.5310719912. The cubic root of 2156351418 is about 1291.9325675618.

The spelling of 2156351418 in words is "two billion, one hundred fifty-six million, three hundred fifty-one thousand, four hundred eighteen".