27157316508 has 144 divisors (see below), whose sum is σ = 81441884160. Its totient is φ = 7466601600.

The previous prime is 27157316503. The next prime is 27157316513. The reversal of 27157316508 is 80561375172.

It is a happy number.

27157316508 is a `hidden beast` number, since 2 + 71 + 5 + 73 + 1 + 6 + 508 = 666.

It is an interprime number because it is at equal distance from previous prime (27157316503) and next prime (27157316513).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27157316503) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1388638 + ... + 1408058.

It is an arithmetic number, because the mean of its divisors is an integer number (565568640).

Almost surely, 2^27157316508 is an apocalyptic number.

27157316508 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27157316508, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40720942080).

27157316508 is an abundant number, since it is smaller than the sum of its proper divisors (54284567652).

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

27157316508 is a wasteful number, since it uses less digits than its factorization.

27157316508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19648 (or 19643 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 45.

The spelling of 27157316508 in words is "twenty-seven billion, one hundred fifty-seven million, three hundred sixteen thousand, five hundred eight".