55016866720172 has 24 divisors (see below), whose sum is σ = 110825343041280. Its totient is φ = 23409026537040.

The previous prime is 55016866720159. The next prime is 55016866720187. The reversal of 55016866720172 is 27102766861055.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7067938904 + ... + 7067946687.

It is an arithmetic number, because the mean of its divisors is an integer number (4617722626720).

Almost surely, 2^{55016866720172} is an apocalyptic number.

It is an amenable number.

55016866720172 is an abundant number, since it is smaller than the sum of its proper divisors (55808476321108).

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

55016866720172 is a wasteful number, since it uses less digits than its factorization.

55016866720172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14135885741 (or 14135885739 counting only the distinct ones).

The product of its (nonzero) digits is 8467200, while the sum is 56.

The spelling of 55016866720172 in words is "fifty-five trillion, sixteen billion, eight hundred sixty-six million, seven hundred twenty thousand, one hundred seventy-two".