55000022166720 has 84 divisors (see below), whose sum is σ = 189177159587520. Its totient is φ = 14666672577024.

The previous prime is 55000022166667. The next prime is 55000022166773. The reversal of 55000022166720 is 2766122000055.

55000022166720 is a `hidden beast` number, since 5 + 500 + 0 + 0 + 2 + 21 + 66 + 72 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (55000022166667) and next prime (55000022166773).

It is a Harshad number since it is a multiple of its sum of digits (36).

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 11 ways as a sum of consecutive naturals, for example, 9548612080 + ... + 9548617839.

Almost surely, 2^{55000022166720} is an apocalyptic number.

It is an amenable number.

55000022166720 is an abundant number, since it is smaller than the sum of its proper divisors (134177137420800).

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

55000022166720 is a wasteful number, since it uses less digits than its factorization.

55000022166720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19097229942 (or 19097229929 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

Adding to 55000022166720 its reverse (2766122000055), we get a palindrome (57766144166775).

The spelling of 55000022166720 in words is "fifty-five trillion, twenty-two million, one hundred sixty-six thousand, seven hundred twenty".