2556105553 has 2 divisors, whose sum is σ = 2556105554. Its totient is φ = 2556105552.

The previous prime is 2556105547. The next prime is 2556105569. The reversal of 2556105553 is 3555016552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1749999889 + 806105664 = 41833^2 + 28392^2 .

It is a cyclic number.

It is not a de Polignac number, because 2556105553 - 2¹³ = 2556097361 is a prime.

It is not a weakly prime, because it can be changed into another prime (2556105583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1278052776 + 1278052777.

It is an arithmetic number, because the mean of its divisors is an integer number (1278052777).

Almost surely, 2^2556105553 is an apocalyptic number.

It is an amenable number.

2556105553 is a deficient number, since it is larger than the sum of its proper divisors (1).

2556105553 is an equidigital number, since it uses as much as digits as its factorization.

2556105553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112500, while the sum is 37.

The square root of 2556105553 is about 50557.9425313175. The cubic root of 2556105553 is about 1367.2867166675.

The spelling of 2556105553 in words is "two billion, five hundred fifty-six million, one hundred five thousand, five hundred fifty-three".