2655426581 has 2 divisors, whose sum is σ = 2655426582. Its totient is φ = 2655426580.

The previous prime is 2655426559. The next prime is 2655426589. The reversal of 2655426581 is 1856245562.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2043853681 + 611572900 = 45209^2 + 24730^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2655426581 is a prime.

It is a super-2 number, since 2×2655426581² = 14102580654162699122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2655426589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1327713290 + 1327713291.

It is an arithmetic number, because the mean of its divisors is an integer number (1327713291).

Almost surely, 2^2655426581 is an apocalyptic number.

It is an amenable number.

2655426581 is a deficient number, since it is larger than the sum of its proper divisors (1).

2655426581 is an equidigital number, since it uses as much as digits as its factorization.

2655426581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576000, while the sum is 44.

The square root of 2655426581 is about 51530.8313633693. The cubic root of 2655426581 is about 1384.7714447758.

It can be divided in two parts, 26554 and 26581, that added together give a palindrome (53135).

The spelling of 2655426581 in words is "two billion, six hundred fifty-five million, four hundred twenty-six thousand, five hundred eighty-one".