27501680018 has 4 divisors (see below), whose sum is σ = 41252520030. Its totient is φ = 13750840008.

The previous prime is 27501679951. The next prime is 27501680023. The reversal of 27501680018 is 81008610572.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 24007333249 + 3494346769 = 154943^2 + 59113^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6875420003 + ... + 6875420006.

Almost surely, 2^27501680018 is an apocalyptic number.

27501680018 is a deficient number, since it is larger than the sum of its proper divisors (13750840012).

27501680018 is a wasteful number, since it uses less digits than its factorization.

27501680018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13750840011.

The product of its (nonzero) digits is 26880, while the sum is 38.

The spelling of 27501680018 in words is "twenty-seven billion, five hundred one million, six hundred eighty thousand, eighteen".