2557131265 has 8 divisors (see below), whose sum is σ = 3304600488. Its totient is φ = 1888343040.

The previous prime is 2557131253. The next prime is 2557131277. The reversal of 2557131265 is 5621317552.

It is an interprime number because it is at equal distance from previous prime (2557131253) and next prime (2557131277).

It can be written as a sum of positive squares in 4 ways, for example, as 497423809 + 2059707456 = 22303^2 + 45384^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2557131265 - 2⁵ = 2557131233 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19670176 + ... + 19670305.

It is an arithmetic number, because the mean of its divisors is an integer number (413075061).

Almost surely, 2^2557131265 is an apocalyptic number.

It is an amenable number.

2557131265 is a deficient number, since it is larger than the sum of its proper divisors (747469223).

2557131265 is a wasteful number, since it uses less digits than its factorization.

2557131265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39340499.

The product of its digits is 63000, while the sum is 37.

The square root of 2557131265 is about 50568.0854393361. The cubic root of 2557131265 is about 1367.4695801180.

The spelling of 2557131265 in words is "two billion, five hundred fifty-seven million, one hundred thirty-one thousand, two hundred sixty-five".