56861134849 has 2 divisors, whose sum is σ = 56861134850. Its totient is φ = 56861134848.

The previous prime is 56861134807. The next prime is 56861134901. The reversal of 56861134849 is 94843116865.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33927061249 + 22934073600 = 184193^2 + 151440^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56861134849 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56861134849.

It is not a weakly prime, because it can be changed into another prime (56861134949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28430567424 + 28430567425.

It is an arithmetic number, because the mean of its divisors is an integer number (28430567425).

Almost surely, 2^56861134849 is an apocalyptic number.

It is an amenable number.

56861134849 is a deficient number, since it is larger than the sum of its proper divisors (1).

56861134849 is an equidigital number, since it uses as much as digits as its factorization.

56861134849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4976640, while the sum is 55.

The spelling of 56861134849 in words is "fifty-six billion, eight hundred sixty-one million, one hundred thirty-four thousand, eight hundred forty-nine".