55361172018 has 8 divisors (see below), whose sum is σ = 110722344048. Its totient is φ = 18453724004.

The previous prime is 55361171981. The next prime is 55361172023. The reversal of 55361172018 is 81027116355.

It is a sphenic number, since it is the product of 3 distinct primes.

55361172018 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4613430996 + ... + 4613431007.

It is an arithmetic number, because the mean of its divisors is an integer number (13840293006).

Almost surely, 2^55361172018 is an apocalyptic number.

55361172018 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55361172018 is a wasteful number, since it uses less digits than its factorization.

55361172018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9226862008.

The product of its (nonzero) digits is 50400, while the sum is 39.

The spelling of 55361172018 in words is "fifty-five billion, three hundred sixty-one million, one hundred seventy-two thousand, eighteen".