2656023389 has 4 divisors (see below), whose sum is σ = 2658811356. Its totient is φ = 2653235424.

The previous prime is 2656023367. The next prime is 2656023449. The reversal of 2656023389 is 9833206562.

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 608460889 + 2047562500 = 24667^2 + 45250^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2656023389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2656023329) 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, 1392554 + ... + 1394459.

It is an arithmetic number, because the mean of its divisors is an integer number (664702839).

Almost surely, 2^2656023389 is an apocalyptic number.

It is an amenable number.

2656023389 is a deficient number, since it is larger than the sum of its proper divisors (2787967).

2656023389 is an equidigital number, since it uses as much as digits as its factorization.

2656023389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2787966.

The product of its (nonzero) digits is 466560, while the sum is 44.

The square root of 2656023389 is about 51536.6218237090. The cubic root of 2656023389 is about 1384.8751796177.

The spelling of 2656023389 in words is "two billion, six hundred fifty-six million, twenty-three thousand, three hundred eighty-nine".