27390990555 has 12 divisors (see below), whose sum is σ = 47477717040. Its totient is φ = 14608528272.

The previous prime is 27390990479. The next prime is 27390990587. The reversal of 27390990555 is 55509909372.

It is not a de Polignac number, because 27390990555 - 2⁹ = 27390990043 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 304344295 + ... + 304344384.

It is an arithmetic number, because the mean of its divisors is an integer number (3956476420).

Almost surely, 2^27390990555 is an apocalyptic number.

27390990555 is a deficient number, since it is larger than the sum of its proper divisors (20086726485).

27390990555 is a wasteful number, since it uses less digits than its factorization.

27390990555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608688690 (or 608688687 counting only the distinct ones).

The product of its (nonzero) digits is 3827250, while the sum is 54.

The spelling of 27390990555 in words is "twenty-seven billion, three hundred ninety million, nine hundred ninety thousand, five hundred fifty-five".