2656010261 has 4 divisors (see below), whose sum is σ = 2771488992. Its totient is φ = 2540531532.

The previous prime is 2656010237. The next prime is 2656010263. The reversal of 2656010261 is 1620106562.

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 2656010261 - 2³⁰ = 1582268437 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 (2656010263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57739331 + ... + 57739376.

It is an arithmetic number, because the mean of its divisors is an integer number (692872248).

Almost surely, 2^2656010261 is an apocalyptic number.

It is an amenable number.

2656010261 is a deficient number, since it is larger than the sum of its proper divisors (115478731).

2656010261 is a wasteful number, since it uses less digits than its factorization.

2656010261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115478730.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 2656010261 is about 51536.4944578112. The cubic root of 2656010261 is about 1384.8728979270.

The spelling of 2656010261 in words is "two billion, six hundred fifty-six million, ten thousand, two hundred sixty-one".