2551398912 has 120 divisors (see below), whose sum is σ = 7636604976. Its totient is φ = 850424832.

The previous prime is 2551398911. The next prime is 2551398919. The reversal of 2551398912 is 2198931552.

2551398912 is a `hidden beast` number, since 2 + 551 + 3 + 9 + 8 + 91 + 2 = 666.

It is a super-4 number, since 4×2551398912⁴ (a number of 39 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (2551398911) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 114163 + ... + 134669.

Almost surely, 2^2551398912 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 2551398912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3818302488).

2551398912 is an abundant number, since it is smaller than the sum of its proper divisors (5085206064).

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

2551398912 is an frugal number, since it uses more digits than its factorization.

2551398912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20540 (or 20512 counting only the distinct ones).

The product of its digits is 194400, while the sum is 45.

The square root of 2551398912 is about 50511.3740854473. The cubic root of 2551398912 is about 1366.4469910913.

The spelling of 2551398912 in words is "two billion, five hundred fifty-one million, three hundred ninety-eight thousand, nine hundred twelve".