2656652521 has 4 divisors (see below), whose sum is σ = 2656907344. Its totient is φ = 2656397700.

The previous prime is 2656652519. The next prime is 2656652563. The reversal of 2656652521 is 1252566562.

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 2656652521 - 2¹ = 2656652519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2656632521) 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, 111075 + ... + 132856.

It is an arithmetic number, because the mean of its divisors is an integer number (664226836).

Almost surely, 2^2656652521 is an apocalyptic number.

It is an amenable number.

2656652521 is a deficient number, since it is larger than the sum of its proper divisors (254823).

2656652521 is a wasteful number, since it uses less digits than its factorization.

2656652521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254822.

The product of its digits is 216000, while the sum is 40.

The square root of 2656652521 is about 51542.7251995856. The cubic root of 2656652521 is about 1384.9845160680.

The spelling of 2656652521 in words is "two billion, six hundred fifty-six million, six hundred fifty-two thousand, five hundred twenty-one".