56851799149 has 2 divisors, whose sum is σ = 56851799150. Its totient is φ = 56851799148.

The previous prime is 56851799141. The next prime is 56851799293. The reversal of 56851799149 is 94199715865.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33692438025 + 23159361124 = 183555^2 + 152182^2 .

It is a cyclic number.

It is not a de Polignac number, because 56851799149 - 2³ = 56851799141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56851799141) 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, 28425899574 + 28425899575.

It is an arithmetic number, because the mean of its divisors is an integer number (28425899575).

Almost surely, 2^56851799149 is an apocalyptic number.

It is an amenable number.

56851799149 is a deficient number, since it is larger than the sum of its proper divisors (1).

56851799149 is an equidigital number, since it uses as much as digits as its factorization.

56851799149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24494400, while the sum is 64.

The spelling of 56851799149 in words is "fifty-six billion, eight hundred fifty-one million, seven hundred ninety-nine thousand, one hundred forty-nine".