27815518379 has 8 divisors (see below), whose sum is σ = 31164315888. Its totient is φ = 24603406560.

The previous prime is 27815518363. The next prime is 27815518387. The reversal of 27815518379 is 97381551872.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27815518379 - 2⁴ = 27815518363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27815518279) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34170992 + ... + 34171805.

It is an arithmetic number, because the mean of its divisors is an integer number (3895539486).

Almost surely, 2^27815518379 is an apocalyptic number.

27815518379 is a deficient number, since it is larger than the sum of its proper divisors (3348797509).

27815518379 is a wasteful number, since it uses less digits than its factorization.

27815518379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68342845.

The product of its digits is 4233600, while the sum is 56.

The spelling of 27815518379 in words is "twenty-seven billion, eight hundred fifteen million, five hundred eighteen thousand, three hundred seventy-nine".