2556534405 has 16 divisors (see below), whose sum is σ = 4142234880. Its totient is φ = 1346225088.

The previous prime is 2556534389. The next prime is 2556534413. The reversal of 2556534405 is 5044356552.

It is not a de Polignac number, because 2556534405 - 2⁴ = 2556534389 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1077522 + ... + 1079891.

It is an arithmetic number, because the mean of its divisors is an integer number (258889680).

Almost surely, 2^2556534405 is an apocalyptic number.

It is an amenable number.

2556534405 is a deficient number, since it is larger than the sum of its proper divisors (1585700475).

2556534405 is a wasteful number, since it uses less digits than its factorization.

2556534405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2157500.

The product of its (nonzero) digits is 360000, while the sum is 39.

The square root of 2556534405 is about 50562.1835465993. The cubic root of 2556534405 is about 1367.3631781491.

The spelling of 2556534405 in words is "two billion, five hundred fifty-six million, five hundred thirty-four thousand, four hundred five".