2556105457 has 4 divisors (see below), whose sum is σ = 2556406756. Its totient is φ = 2555804160.

The previous prime is 2556105451. The next prime is 2556105547. The reversal of 2556105457 is 7545016552.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1943839921 + 612265536 = 44089^2 + 24744^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2556105457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2556105451) 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, 137544 + ... + 155017.

It is an arithmetic number, because the mean of its divisors is an integer number (639101689).

Almost surely, 2^2556105457 is an apocalyptic number.

It is an amenable number.

2556105457 is a deficient number, since it is larger than the sum of its proper divisors (301299).

2556105457 is an equidigital number, since it uses as much as digits as its factorization.

2556105457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301298.

The product of its (nonzero) digits is 210000, while the sum is 40.

The square root of 2556105457 is about 50557.9415819117. The cubic root of 2556105457 is about 1367.2866995503.

The spelling of 2556105457 in words is "two billion, five hundred fifty-six million, one hundred five thousand, four hundred fifty-seven".