2556456553 has 8 divisors (see below), whose sum is σ = 2924603072. Its totient is φ = 2189044656.

The previous prime is 2556456547. The next prime is 2556456557. The reversal of 2556456553 is 3556546552.

It is a happy number.

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 2556456553 - 2¹⁷ = 2556325481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2556456557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 176175 + ... + 190132.

It is an arithmetic number, because the mean of its divisors is an integer number (365575384).

Almost surely, 2^2556456553 is an apocalyptic number.

It is an amenable number.

2556456553 is a deficient number, since it is larger than the sum of its proper divisors (368146519).

2556456553 is an equidigital number, since it uses as much as digits as its factorization.

2556456553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367311.

The product of its digits is 2700000, while the sum is 46.

The square root of 2556456553 is about 50561.4136768346. The cubic root of 2556456553 is about 1367.3492982865.

The spelling of 2556456553 in words is "two billion, five hundred fifty-six million, four hundred fifty-six thousand, five hundred fifty-three".