27942121386 has 24 divisors (see below), whose sum is σ = 60747899940. Its totient is φ = 9282250176.

The previous prime is 27942121369. The next prime is 27942121391. The reversal of 27942121386 is 68312124972.

27942121386 is a `hidden beast` number, since 2 + 7 + 9 + 421 + 213 + 8 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 22748180625 + 5193940761 = 150825^2 + 72069^2 .

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, 2643771 + ... + 2654318.

Almost surely, 2^27942121386 is an apocalyptic number.

27942121386 is an abundant number, since it is smaller than the sum of its proper divisors (32805778554).

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

27942121386 is a wasteful number, since it uses less digits than its factorization.

27942121386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5298390 (or 5298387 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The spelling of 27942121386 in words is "twenty-seven billion, nine hundred forty-two million, one hundred twenty-one thousand, three hundred eighty-six".