56881990873 has 2 divisors, whose sum is σ = 56881990874. Its totient is φ = 56881990872.

The previous prime is 56881990849. The next prime is 56881990889. The reversal of 56881990873 is 37809918865.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28497491344 + 28384499529 = 168812^2 + 168477^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56881990873 is a prime.

It is not a weakly prime, because it can be changed into another prime (56881990573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28440995436 + 28440995437.

It is an arithmetic number, because the mean of its divisors is an integer number (28440995437).

Almost surely, 2^56881990873 is an apocalyptic number.

It is an amenable number.

56881990873 is a deficient number, since it is larger than the sum of its proper divisors (1).

56881990873 is an equidigital number, since it uses as much as digits as its factorization.

56881990873 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26127360, while the sum is 64.

The spelling of 56881990873 in words is "fifty-six billion, eight hundred eighty-one million, nine hundred ninety thousand, eight hundred seventy-three".