2556261465 has 16 divisors (see below), whose sum is σ = 4110576000. Its totient is φ = 1356486912.

The previous prime is 2556261451. The next prime is 2556261529. The reversal of 2556261465 is 5641626552.

It is a happy number.

2556261465 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2556261465 - 2¹⁷ = 2556130393 is a prime.

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, 425200 + ... + 431169.

It is an arithmetic number, because the mean of its divisors is an integer number (256911000).

Almost surely, 2^2556261465 is an apocalyptic number.

It is an amenable number.

2556261465 is a deficient number, since it is larger than the sum of its proper divisors (1554314535).

2556261465 is a wasteful number, since it uses less digits than its factorization.

2556261465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856576.

The product of its digits is 432000, while the sum is 42.

The square root of 2556261465 is about 50559.4844218174. The cubic root of 2556261465 is about 1367.3145157376.

The spelling of 2556261465 in words is "two billion, five hundred fifty-six million, two hundred sixty-one thousand, four hundred sixty-five".