27137391156 has 72 divisors (see below), whose sum is σ = 71796763584. Its totient is φ = 8626273920.

The previous prime is 27137391137. The next prime is 27137391157. The reversal of 27137391156 is 65119373172.

27137391156 is a `hidden beast` number, since 271 + 373 + 9 + 1 + 1 + 5 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27137391157) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 224560 + ... + 323576.

It is an arithmetic number, because the mean of its divisors is an integer number (997177272).

Almost surely, 2^27137391156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27137391156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35898381792).

27137391156 is an abundant number, since it is smaller than the sum of its proper divisors (44659372428).

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

27137391156 is a wasteful number, since it uses less digits than its factorization.

27137391156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99381 (or 99376 counting only the distinct ones).

The product of its digits is 238140, while the sum is 45.

The spelling of 27137391156 in words is "twenty-seven billion, one hundred thirty-seven million, three hundred ninety-one thousand, one hundred fifty-six".