27161517018 has 16 divisors (see below), whose sum is σ = 54327073536. Its totient is φ = 9053165760.

The previous prime is 27161516989. The next prime is 27161517157. The reversal of 27161517018 is 81071516172.

It is a super-3 number, since 3×27161517018³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77098 + ... + 245493.

It is an arithmetic number, because the mean of its divisors is an integer number (3395442096).

Almost surely, 2^27161517018 is an apocalyptic number.

27161517018 is an abundant number, since it is smaller than the sum of its proper divisors (27165556518).

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

27161517018 is a wasteful number, since it uses less digits than its factorization.

27161517018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336629.

The product of its (nonzero) digits is 23520, while the sum is 39.

The spelling of 27161517018 in words is "twenty-seven billion, one hundred sixty-one million, five hundred seventeen thousand, eighteen".