2551068990 has 48 divisors (see below), whose sum is σ = 6673509648. Its totient is φ = 676107648.

The previous prime is 2551068973. The next prime is 2551069021. The reversal of 2551068990 is 998601552.

2551068990 is a `hidden beast` number, since 2 + 551 + 0 + 6 + 8 + 9 + 90 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 72279 + ... + 101618.

It is an arithmetic number, because the mean of its divisors is an integer number (139031451).

Almost surely, 2^2551068990 is an apocalyptic number.

2551068990 is an abundant number, since it is smaller than the sum of its proper divisors (4122440658).

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

2551068990 is a wasteful number, since it uses less digits than its factorization.

2551068990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174073 (or 174070 counting only the distinct ones).

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

The square root of 2551068990 is about 50508.1081609676. The cubic root of 2551068990 is about 1366.3880900239.

The spelling of 2551068990 in words is "two billion, five hundred fifty-one million, sixty-eight thousand, nine hundred ninety".