27637611138 has 12 divisors (see below), whose sum is σ = 59881490838. Its totient is φ = 9212537040.

The previous prime is 27637611137. The next prime is 27637611139. The reversal of 27637611138 is 83111673672.

27637611138 is a `hidden beast` number, since 2 + 7 + 637 + 6 + 1 + 1 + 1 + 3 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (27637611137) and next prime (27637611139).

It can be written as a sum of positive squares in only one way, i.e., 22581974529 + 5055636609 = 150273^2 + 71103^2 .

It is a super-3 number, since 3×27637611138³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 27637611093 and 27637611102.

It is not an unprimeable number, because it can be changed into a prime (27637611137) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 767711403 + ... + 767711438.

Almost surely, 2^27637611138 is an apocalyptic number.

27637611138 is an abundant number, since it is smaller than the sum of its proper divisors (32243879700).

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

27637611138 is a wasteful number, since it uses less digits than its factorization.

27637611138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1535422849 (or 1535422846 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The spelling of 27637611138 in words is "twenty-seven billion, six hundred thirty-seven million, six hundred eleven thousand, one hundred thirty-eight".