55167218887 has 4 divisors (see below), whose sum is σ = 60182420616. Its totient is φ = 50152017160.

The previous prime is 55167218881. The next prime is 55167218921. The reversal of 55167218887 is 78881276155.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55167218887 - 2³ = 55167218879 is a prime.

It is a super-3 number, since 3×55167218887³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55167218881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2507600848 + ... + 2507600869.

It is an arithmetic number, because the mean of its divisors is an integer number (15045605154).

Almost surely, 2^55167218887 is an apocalyptic number.

55167218887 is a deficient number, since it is larger than the sum of its proper divisors (5015201729).

55167218887 is a wasteful number, since it uses less digits than its factorization.

55167218887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5015201728.

The product of its digits is 7526400, while the sum is 58.

The spelling of 55167218887 in words is "fifty-five billion, one hundred sixty-seven million, two hundred eighteen thousand, eight hundred eighty-seven".