2551842009 has 32 divisors (see below), whose sum is σ = 3962851200. Its totient is φ = 1621105920.

The previous prime is 2551841993. The next prime is 2551842053. The reversal of 2551842009 is 9002481552.

2551842009 is a `hidden beast` number, since 2 + 551 + 84 + 20 + 0 + 9 = 666.

It is not a de Polignac number, because 2551842009 - 2⁴ = 2551841993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2551842109) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20797 + ... + 74405.

It is an arithmetic number, because the mean of its divisors is an integer number (123839100).

Almost surely, 2^2551842009 is an apocalyptic number.

It is an amenable number.

2551842009 is a deficient number, since it is larger than the sum of its proper divisors (1411009191).

2551842009 is a wasteful number, since it uses less digits than its factorization.

2551842009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53702 (or 53696 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 2551842009 is about 50515.7600061605. The cubic root of 2551842009 is about 1366.5260893345.

The spelling of 2551842009 in words is "two billion, five hundred fifty-one million, eight hundred forty-two thousand, nine".