27458724138 has 32 divisors (see below), whose sum is σ = 55691765376. Its totient is φ = 9023954688.

The previous prime is 27458724121. The next prime is 27458724149. The reversal of 27458724138 is 83142785472.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1240395 + ... + 1262337.

It is an arithmetic number, because the mean of its divisors is an integer number (1740367668).

Almost surely, 2^27458724138 is an apocalyptic number.

27458724138 is an abundant number, since it is smaller than the sum of its proper divisors (28233041238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27458724138 is a wasteful number, since it uses less digits than its factorization.

27458724138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24878.

The product of its digits is 3010560, while the sum is 51.

The spelling of 27458724138 in words is "twenty-seven billion, four hundred fifty-eight million, seven hundred twenty-four thousand, one hundred thirty-eight".