27985199055 has 64 divisors (see below), whose sum is σ = 51806684160. Its totient is φ = 12765772800.

The previous prime is 27985199051. The next prime is 27985199057. The reversal of 27985199055 is 55099158972.

It is not a de Polignac number, because 27985199055 - 2² = 27985199051 is a prime.

It is a super-2 number, since 2×27985199055² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 27985199055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27985199051) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 171051 + ... + 291939.

It is an arithmetic number, because the mean of its divisors is an integer number (809479440).

Almost surely, 2^27985199055 is an apocalyptic number.

27985199055 is a deficient number, since it is larger than the sum of its proper divisors (23821485105).

27985199055 is a wasteful number, since it uses less digits than its factorization.

27985199055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120992.

The product of its (nonzero) digits is 10206000, while the sum is 60.

The spelling of 27985199055 in words is "twenty-seven billion, nine hundred eighty-five million, one hundred ninety-nine thousand, fifty-five".