2556566712601 has 4 divisors (see below), whose sum is σ = 2788981868304. Its totient is φ = 2324151556900.

The previous prime is 2556566712571. The next prime is 2556566712613. The reversal of 2556566712601 is 1062176656552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2556566712601 - 2⁷ = 2556566712473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2556566712671) 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, 116207577835 + ... + 116207577856.

It is an arithmetic number, because the mean of its divisors is an integer number (697245467076).

Almost surely, 2^{2556566712601} is an apocalyptic number.

It is an amenable number.

2556566712601 is a deficient number, since it is larger than the sum of its proper divisors (232415155703).

2556566712601 is a wasteful number, since it uses less digits than its factorization.

2556566712601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232415155702.

The product of its (nonzero) digits is 4536000, while the sum is 52.

The spelling of 2556566712601 in words is "two trillion, five hundred fifty-six billion, five hundred sixty-six million, seven hundred twelve thousand, six hundred one".