2551644265 has 8 divisors (see below), whose sum is σ = 3195102528. Its totient is φ = 1952562480.

The previous prime is 2551644253. The next prime is 2551644323. The reversal of 2551644265 is 5624461552.

It is a happy number.

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

It is not a de Polignac number, because 2551644265 - 2¹⁵ = 2551611497 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 (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11093991 + ... + 11094220.

It is an arithmetic number, because the mean of its divisors is an integer number (399387816).

Almost surely, 2^2551644265 is an apocalyptic number.

It is an amenable number.

2551644265 is a deficient number, since it is larger than the sum of its proper divisors (643458263).

2551644265 is a wasteful number, since it uses less digits than its factorization.

2551644265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22188239.

The product of its digits is 288000, while the sum is 40.

The square root of 2551644265 is about 50513.8027176731. The cubic root of 2551644265 is about 1366.4907907392.

The spelling of 2551644265 in words is "two billion, five hundred fifty-one million, six hundred forty-four thousand, two hundred sixty-five".