2656051643 has 4 divisors (see below), whose sum is σ = 3035487600. Its totient is φ = 2276615688.

The previous prime is 2656051633. The next prime is 2656051663. The reversal of 2656051643 is 3461506562.

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 2656051643 - 2¹⁴ = 2656035259 is a prime.

It is a super-2 number, since 2×2656051643² = 14109220660565998898, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2656051597 and 2656051606.

It is not an unprimeable number, because it can be changed into a prime (2656051603) 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, 189717968 + ... + 189717981.

It is an arithmetic number, because the mean of its divisors is an integer number (758871900).

Almost surely, 2^2656051643 is an apocalyptic number.

2656051643 is a deficient number, since it is larger than the sum of its proper divisors (379435957).

2656051643 is an equidigital number, since it uses as much as digits as its factorization.

2656051643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379435956.

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

The square root of 2656051643 is about 51536.8959387350. The cubic root of 2656051643 is about 1384.8800902327.

The spelling of 2656051643 in words is "two billion, six hundred fifty-six million, fifty-one thousand, six hundred forty-three".