2656640235 has 16 divisors (see below), whose sum is σ = 4500661536. Its totient is φ = 1333529088.

The previous prime is 2656640227. The next prime is 2656640237. The reversal of 2656640235 is 5320466562.

It is not a de Polignac number, because 2656640235 - 2³ = 2656640227 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2656640193 and 2656640202.

It is not an unprimeable number, because it can be changed into a prime (2656640237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5208844 + ... + 5209353.

It is an arithmetic number, because the mean of its divisors is an integer number (281291346).

Almost surely, 2^2656640235 is an apocalyptic number.

2656640235 is a deficient number, since it is larger than the sum of its proper divisors (1844021301).

2656640235 is a wasteful number, since it uses less digits than its factorization.

2656640235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10418222.

The product of its (nonzero) digits is 259200, while the sum is 39.

The square root of 2656640235 is about 51542.6060167702. The cubic root of 2656640235 is about 1384.9823810572.

The spelling of 2656640235 in words is "two billion, six hundred fifty-six million, six hundred forty thousand, two hundred thirty-five".