2655647257 has 4 divisors (see below), whose sum is σ = 2660502736. Its totient is φ = 2650791780.

The previous prime is 2655647243. The next prime is 2655647297. The reversal of 2655647257 is 7527465562.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2655647257 is a prime.

It is a super-2 number, since 2×2655647257² = 14104924707223248098, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2655647257.

It is not an unprimeable number, because it can be changed into a prime (2655647207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2426919 + ... + 2428012.

It is an arithmetic number, because the mean of its divisors is an integer number (665125684).

Almost surely, 2^2655647257 is an apocalyptic number.

It is an amenable number.

2655647257 is a deficient number, since it is larger than the sum of its proper divisors (4855479).

2655647257 is an equidigital number, since it uses as much as digits as its factorization.

2655647257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4855478.

The product of its digits is 3528000, while the sum is 49.

The square root of 2655647257 is about 51532.9725224540. The cubic root of 2655647257 is about 1384.8098036294.

The spelling of 2655647257 in words is "two billion, six hundred fifty-five million, six hundred forty-seven thousand, two hundred fifty-seven".