55307000561 has 4 divisors (see below), whose sum is σ = 55307837952. Its totient is φ = 55306163172.

The previous prime is 55307000543. The next prime is 55307000587. The reversal of 55307000561 is 16500070355.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55307000561 is a prime.

It is a super-2 number, since 2×55307000561² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55307000591) 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 in 3 ways as a sum of consecutive naturals, for example, 310265 + ... + 454838.

It is an arithmetic number, because the mean of its divisors is an integer number (13826959488).

Almost surely, 2^55307000561 is an apocalyptic number.

It is an amenable number.

55307000561 is a deficient number, since it is larger than the sum of its proper divisors (837391).

55307000561 is an equidigital number, since it uses as much as digits as its factorization.

55307000561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 837390.

The product of its (nonzero) digits is 15750, while the sum is 32.

The spelling of 55307000561 in words is "fifty-five billion, three hundred seven million, five hundred sixty-one", and thus it is an aban number.