2551844688 has 20 divisors (see below), whose sum is σ = 6592265568. Its totient is φ = 850614880.

The previous prime is 2551844683. The next prime is 2551844693. The reversal of 2551844688 is 8864481552.

It is an interprime number because it is at equal distance from previous prime (2551844683) and next prime (2551844693).

It is a super-2 number, since 2×2551844688² = 13023822623347634688, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2551844688.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2551844681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26581668 + ... + 26581763.

Almost surely, 2^2551844688 is an apocalyptic number.

It is an amenable number.

2551844688 is an abundant number, since it is smaller than the sum of its proper divisors (4040420880).

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

2551844688 is a wasteful number, since it uses less digits than its factorization.

2551844688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53163442 (or 53163436 counting only the distinct ones).

The product of its digits is 2457600, while the sum is 51.

The square root of 2551844688 is about 50515.7865226307. The cubic root of 2551844688 is about 1366.5265675410.

The spelling of 2551844688 in words is "two billion, five hundred fifty-one million, eight hundred forty-four thousand, six hundred eighty-eight".