56542385989 has 2 divisors, whose sum is σ = 56542385990. Its totient is φ = 56542385988.

The previous prime is 56542385957. The next prime is 56542386001. The reversal of 56542385989 is 98958324565.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47942605764 + 8599780225 = 218958^2 + 92735^2 .

It is a cyclic number.

It is not a de Polignac number, because 56542385989 - 2⁵ = 56542385957 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56542385989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56542385089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28271192994 + 28271192995.

It is an arithmetic number, because the mean of its divisors is an integer number (28271192995).

Almost surely, 2^56542385989 is an apocalyptic number.

It is an amenable number.

56542385989 is a deficient number, since it is larger than the sum of its proper divisors (1).

56542385989 is an equidigital number, since it uses as much as digits as its factorization.

56542385989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312000, while the sum is 64.

The spelling of 56542385989 in words is "fifty-six billion, five hundred forty-two million, three hundred eighty-five thousand, nine hundred eighty-nine".