55818078 has 8 divisors (see below), whose sum is σ = 111636168. Its totient is φ = 18606024.

The previous prime is 55818017. The next prime is 55818101. The reversal of 55818078 is 87081855.

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

55818078 is an admirable number.

It is a super-2 number, since 2×55818078² = 6231315663228168, which contains 22 as substring.

It is a congruent 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, 4651501 + ... + 4651512.

It is an arithmetic number, because the mean of its divisors is an integer number (13954521).

Almost surely, 2^55818078 is an apocalyptic number.

55818078 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.

55818078 is a wasteful number, since it uses less digits than its factorization.

55818078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9303018.

The product of its (nonzero) digits is 89600, while the sum is 42.

The square root of 55818078 is about 7471.1497107206. The cubic root of 55818078 is about 382.1714963268.

The spelling of 55818078 in words is "fifty-five million, eight hundred eighteen thousand, seventy-eight".