56890254209 has 2 divisors, whose sum is σ = 56890254210. Its totient is φ = 56890254208.

The previous prime is 56890254131. The next prime is 56890254251. The reversal of 56890254209 is 90245209865.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56131086400 + 759167809 = 236920^2 + 27553^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56890254209 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (56890254409) 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 as a sum of consecutive naturals, namely, 28445127104 + 28445127105.

It is an arithmetic number, because the mean of its divisors is an integer number (28445127105).

Almost surely, 2^56890254209 is an apocalyptic number.

It is an amenable number.

56890254209 is a deficient number, since it is larger than the sum of its proper divisors (1).

56890254209 is an equidigital number, since it uses as much as digits as its factorization.

56890254209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1555200, while the sum is 50.

The spelling of 56890254209 in words is "fifty-six billion, eight hundred ninety million, two hundred fifty-four thousand, two hundred nine".