2656042621 has 8 divisors (see below), whose sum is σ = 2694337344. Its totient is φ = 2617772640.

The previous prime is 2656042573. The next prime is 2656042643. The reversal of 2656042621 is 1262406562.

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 2656042621 - 2²³ = 2647654013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2656042021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 387601 + ... + 394393.

It is an arithmetic number, because the mean of its divisors is an integer number (336792168).

Almost surely, 2^2656042621 is an apocalyptic number.

It is an amenable number.

2656042621 is a deficient number, since it is larger than the sum of its proper divisors (38294723).

2656042621 is an equidigital number, since it uses as much as digits as its factorization.

2656042621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12371.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 2656042621 is about 51536.8084091361. The cubic root of 2656042621 is about 1384.8785221906.

The spelling of 2656042621 in words is "two billion, six hundred fifty-six million, forty-two thousand, six hundred twenty-one".