56556554149 has 2 divisors, whose sum is σ = 56556554150. Its totient is φ = 56556554148.

The previous prime is 56556554107. The next prime is 56556554207. The reversal of 56556554149 is 94145565565.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49457312100 + 7099242049 = 222390^2 + 84257^2 .

It is a cyclic number.

It is not a de Polignac number, because 56556554149 - 2³¹ = 54409070501 is a prime.

It is a super-2 number, since 2×56556554149² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 56556554149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56556554749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28278277074 + 28278277075.

It is an arithmetic number, because the mean of its divisors is an integer number (28278277075).

Almost surely, 2^56556554149 is an apocalyptic number.

It is an amenable number.

56556554149 is a deficient number, since it is larger than the sum of its proper divisors (1).

56556554149 is an equidigital number, since it uses as much as digits as its factorization.

56556554149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16200000, while the sum is 55.

The spelling of 56556554149 in words is "fifty-six billion, five hundred fifty-six million, five hundred fifty-four thousand, one hundred forty-nine".