2551645404 has 108 divisors (see below), whose sum is σ = 8185210488. Its totient is φ = 662760000.

The previous prime is 2551645399. The next prime is 2551645441. The reversal of 2551645404 is 4045461552.

2551645404 is a `hidden beast` number, since 2 + 5 + 5 + 1 + 645 + 4 + 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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 46347 + ... + 85154.

It is an arithmetic number, because the mean of its divisors is an integer number (75788986).

Almost surely, 2^2551645404 is an apocalyptic number.

It is an amenable number.

2551645404 is an abundant number, since it is smaller than the sum of its proper divisors (5633565084).

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

2551645404 is a wasteful number, since it uses less digits than its factorization.

2551645404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131536 (or 131524 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 36.

The square root of 2551645404 is about 50513.8139918181. The cubic root of 2551645404 is about 1366.4909940634.

The spelling of 2551645404 in words is "two billion, five hundred fifty-one million, six hundred forty-five thousand, four hundred four".