27998149513455 has 24 divisors (see below), whose sum is σ = 52941955444560. Its totient is φ = 13574860369920.

The previous prime is 27998149513427. The next prime is 27998149513457. The reversal of 27998149513455 is 55431594189972.

It is a happy number.

27998149513455 is a `hidden beast` number, since 2 + 7 + 9 + 9 + 81 + 4 + 95 + 1 + 3 + 455 = 666.

It is not a de Polignac number, because 27998149513455 - 2²⁹ = 27997612642543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27998149513457) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28280958610 + ... + 28280959599.

It is an arithmetic number, because the mean of its divisors is an integer number (2205914810190).

Almost surely, 2^{27998149513455} is an apocalyptic number.

27998149513455 is a deficient number, since it is larger than the sum of its proper divisors (24943805931105).

27998149513455 is a wasteful number, since it uses less digits than its factorization.

27998149513455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56561918231 (or 56561918228 counting only the distinct ones).

The product of its digits is 489888000, while the sum is 72.

The spelling of 27998149513455 in words is "twenty-seven trillion, nine hundred ninety-eight billion, one hundred forty-nine million, five hundred thirteen thousand, four hundred fifty-five".