55609124018 has 90 divisors (see below), whose sum is σ = 100957667037. Its totient is φ = 22971066720.

The previous prime is 55609124017. The next prime is 55609124027. The reversal of 55609124018 is 81042190655.

It can be written as a sum of positive squares in 2 ways, for example, as 39713714089 + 15895409929 = 199283^2 + 126077^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=166747.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55609124017) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 669989405 + ... + 669989487.

Almost surely, 2^55609124018 is an apocalyptic number.

55609124018 is a deficient number, since it is larger than the sum of its proper divisors (45348543019).

55609124018 is an frugal number, since it uses more digits than its factorization.

55609124018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278 (or 133 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 41.

The spelling of 55609124018 in words is "fifty-five billion, six hundred nine million, one hundred twenty-four thousand, eighteen".