2656573889 has 2 divisors, whose sum is σ = 2656573890. Its totient is φ = 2656573888.

The previous prime is 2656573883. The next prime is 2656573999. The reversal of 2656573889 is 9883756562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1914937600 + 741636289 = 43760^2 + 27233^2 .

It is a cyclic number.

It is not a de Polignac number, because 2656573889 - 2⁴ = 2656573873 is a prime.

It is not a weakly prime, because it can be changed into another prime (2656573883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1328286944 + 1328286945.

It is an arithmetic number, because the mean of its divisors is an integer number (1328286945).

Almost surely, 2^2656573889 is an apocalyptic number.

It is an amenable number.

2656573889 is a deficient number, since it is larger than the sum of its proper divisors (1).

2656573889 is an equidigital number, since it uses as much as digits as its factorization.

2656573889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21772800, while the sum is 59.

The square root of 2656573889 is about 51541.9624092836. The cubic root of 2656573889 is about 1384.9708516067.

The spelling of 2656573889 in words is "two billion, six hundred fifty-six million, five hundred seventy-three thousand, eight hundred eighty-nine".