2656423769 has 4 divisors (see below), whose sum is σ = 2728219044. Its totient is φ = 2584628496.

The previous prime is 2656423753. The next prime is 2656423799. The reversal of 2656423769 is 9673246562.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1363086400 + 1293337369 = 36920^2 + 35963^2 .

It is a cyclic number.

It is not a de Polignac number, because 2656423769 - 2⁴ = 2656423753 is a prime.

It is a super-2 number, since 2×2656423769² = 14113174481016330722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2656423799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35897582 + ... + 35897655.

It is an arithmetic number, because the mean of its divisors is an integer number (682054761).

Almost surely, 2^2656423769 is an apocalyptic number.

It is an amenable number.

2656423769 is a deficient number, since it is larger than the sum of its proper divisors (71795275).

2656423769 is an equidigital number, since it uses as much as digits as its factorization.

2656423769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71795274.

The product of its digits is 3265920, while the sum is 50.

The square root of 2656423769 is about 51540.5060995718. The cubic root of 2656423769 is about 1384.9447634007.

The spelling of 2656423769 in words is "two billion, six hundred fifty-six million, four hundred twenty-three thousand, seven hundred sixty-nine".