27758866454 has 16 divisors (see below), whose sum is σ = 45510803856. Its totient is φ = 12593443200.

The previous prime is 27758866397. The next prime is 27758866477. The reversal of 27758866454 is 45466885772.

It is a super-2 number, since 2×27758866454² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1199447 + ... + 1222370.

It is an arithmetic number, because the mean of its divisors is an integer number (2844425241).

Almost surely, 2^27758866454 is an apocalyptic number.

27758866454 is a deficient number, since it is larger than the sum of its proper divisors (17751937402).

27758866454 is a wasteful number, since it uses less digits than its factorization.

27758866454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2422351.

The product of its digits is 90316800, while the sum is 62.

The spelling of 27758866454 in words is "twenty-seven billion, seven hundred fifty-eight million, eight hundred sixty-six thousand, four hundred fifty-four".