2656646331 has 4 divisors (see below), whose sum is σ = 3542195112. Its totient is φ = 1771097552.

The previous prime is 2656646273. The next prime is 2656646347. The reversal of 2656646331 is 1336466562.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2656646331 - 2⁹ = 2656645819 is a prime.

It is a super-2 number, since 2×2656646331² = 14115539456031523122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2656646381) 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, 442774386 + ... + 442774391.

It is an arithmetic number, because the mean of its divisors is an integer number (885548778).

Almost surely, 2^2656646331 is an apocalyptic number.

2656646331 is a deficient number, since it is larger than the sum of its proper divisors (885548781).

2656646331 is an equidigital number, since it uses as much as digits as its factorization.

2656646331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 885548780.

The product of its digits is 466560, while the sum is 42.

The square root of 2656646331 is about 51542.6651522794. The cubic root of 2656646331 is about 1384.9834403960.

The spelling of 2656646331 in words is "two billion, six hundred fifty-six million, six hundred forty-six thousand, three hundred thirty-one".