2551855657 has 8 divisors (see below), whose sum is σ = 2749715136. Its totient is φ = 2354219472.

The previous prime is 2551855651. The next prime is 2551855673. The reversal of 2551855657 is 7565581552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2551855657 - 2¹⁹ = 2551331369 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2551855657.

It is not an unprimeable number, because it can be changed into a prime (2551855651) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 31693 + ... + 78154.

It is an arithmetic number, because the mean of its divisors is an integer number (343714392).

Almost surely, 2^2551855657 is an apocalyptic number.

It is an amenable number.

2551855657 is a deficient number, since it is larger than the sum of its proper divisors (197859479).

2551855657 is a wasteful number, since it uses less digits than its factorization.

2551855657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111647.

The product of its digits is 2100000, while the sum is 49.

The square root of 2551855657 is about 50515.8950925350. The cubic root of 2551855657 is about 1366.5285255244.

The spelling of 2551855657 in words is "two billion, five hundred fifty-one million, eight hundred fifty-five thousand, six hundred fifty-seven".