2656426409 has 64 divisors (see below), whose sum is σ = 3566384640. Its totient is φ = 1919324160.

The previous prime is 2656426393. The next prime is 2656426459. The reversal of 2656426409 is 9046246562.

It is not a de Polignac number, because 2656426409 - 2⁴ = 2656426393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2656426409.

It is not an unprimeable number, because it can be changed into a prime (2656426459) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 14676299 + ... + 14676479.

It is an arithmetic number, because the mean of its divisors is an integer number (55724760).

Almost surely, 2^2656426409 is an apocalyptic number.

It is an amenable number.

2656426409 is a deficient number, since it is larger than the sum of its proper divisors (909958231).

2656426409 is a wasteful number, since it uses less digits than its factorization.

2656426409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450.

The product of its (nonzero) digits is 622080, while the sum is 44.

The square root of 2656426409 is about 51540.5317104898. The cubic root of 2656426409 is about 1384.9452221946.

The spelling of 2656426409 in words is "two billion, six hundred fifty-six million, four hundred twenty-six thousand, four hundred nine".