2556653811 has 4 divisors (see below), whose sum is σ = 3408871752. Its totient is φ = 1704435872.

The previous prime is 2556653809. The next prime is 2556653831. The reversal of 2556653811 is 1183566552.

It is a happy number.

2556653811 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2556653811 - 2¹ = 2556653809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2556653831) 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, 426108966 + ... + 426108971.

It is an arithmetic number, because the mean of its divisors is an integer number (852217938).

Almost surely, 2^2556653811 is an apocalyptic number.

2556653811 is a deficient number, since it is larger than the sum of its proper divisors (852217941).

2556653811 is an equidigital number, since it uses as much as digits as its factorization.

2556653811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 852217940.

The product of its digits is 216000, while the sum is 42.

The square root of 2556653811 is about 50563.3643164693. The cubic root of 2556653811 is about 1367.3844659291.

The spelling of 2556653811 in words is "two billion, five hundred fifty-six million, six hundred fifty-three thousand, eight hundred eleven".