2556622255651 has 4 divisors (see below), whose sum is σ = 2604860411472. Its totient is φ = 2508384099832.

The previous prime is 2556622255639. The next prime is 2556622255679. The reversal of 2556622255651 is 1565522266552.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2556622255651 - 2⁵ = 2556622255619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2556622255631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24119077831 + ... + 24119077936.

It is an arithmetic number, because the mean of its divisors is an integer number (651215102868).

Almost surely, 2^{2556622255651} is an apocalyptic number.

2556622255651 is a deficient number, since it is larger than the sum of its proper divisors (48238155821).

2556622255651 is an equidigital number, since it uses as much as digits as its factorization.

2556622255651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48238155820.

The product of its digits is 10800000, while the sum is 52.

The spelling of 2556622255651 in words is "two trillion, five hundred fifty-six billion, six hundred twenty-two million, two hundred fifty-five thousand, six hundred fifty-one".