2551361904 has 360 divisors, whose sum is σ = 9366712992. Its totient is φ = 632586240.

The previous prime is 2551361873. The next prime is 2551361927. The reversal of 2551361904 is 4091631552.

2551361904 is a `hidden beast` number, since 25 + 5 + 13 + 619 + 0 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2895544 + ... + 2896424.

Almost surely, 2^2551361904 is an apocalyptic number.

2551361904 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2551361904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4683356496).

2551361904 is an abundant number, since it is smaller than the sum of its proper divisors (6815351088).

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

2551361904 is a wasteful number, since it uses less digits than its factorization.

2551361904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 945 (or 923 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 2551361904 is about 50511.0077507864. The cubic root of 2551361904 is about 1366.4403842955.

The spelling of 2551361904 in words is "two billion, five hundred fifty-one million, three hundred sixty-one thousand, nine hundred four".