2656540613 has 4 divisors (see below), whose sum is σ = 2796358560. Its totient is φ = 2516722668.

The previous prime is 2656540609. The next prime is 2656540631. The reversal of 2656540613 is 3160456562.

It is a happy number.

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 not a de Polignac number, because 2656540613 - 2² = 2656540609 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2656540603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69908945 + ... + 69908982.

It is an arithmetic number, because the mean of its divisors is an integer number (699089640).

Almost surely, 2^2656540613 is an apocalyptic number.

It is an amenable number.

2656540613 is a deficient number, since it is larger than the sum of its proper divisors (139817947).

2656540613 is a wasteful number, since it uses less digits than its factorization.

2656540613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139817946.

The product of its (nonzero) digits is 129600, while the sum is 38.

The square root of 2656540613 is about 51541.6396033343. The cubic root of 2656540613 is about 1384.9650689101.

The spelling of 2656540613 in words is "two billion, six hundred fifty-six million, five hundred forty thousand, six hundred thirteen".