56861134901 has 2 divisors, whose sum is σ = 56861134902. Its totient is φ = 56861134900.

The previous prime is 56861134849. The next prime is 56861134919. The reversal of 56861134901 is 10943116865.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56655900625 + 205234276 = 238025^2 + 14326^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56861134901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56861134921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28430567450 + 28430567451.

It is an arithmetic number, because the mean of its divisors is an integer number (28430567451).

Almost surely, 2^56861134901 is an apocalyptic number.

It is an amenable number.

56861134901 is a deficient number, since it is larger than the sum of its proper divisors (1).

56861134901 is an equidigital number, since it uses as much as digits as its factorization.

56861134901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 44.

The spelling of 56861134901 in words is "fifty-six billion, eight hundred sixty-one million, one hundred thirty-four thousand, nine hundred one".