27645072718 has 4 divisors (see below), whose sum is σ = 41467609080. Its totient is φ = 13822536358.

The previous prime is 27645072677. The next prime is 27645072727. The reversal of 27645072718 is 81727054672.

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

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6911268178 + ... + 6911268181.

It is an arithmetic number, because the mean of its divisors is an integer number (10366902270).

Almost surely, 2^27645072718 is an apocalyptic number.

27645072718 is a deficient number, since it is larger than the sum of its proper divisors (13822536362).

27645072718 is a wasteful number, since it uses less digits than its factorization.

27645072718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13822536361.

The product of its (nonzero) digits is 1317120, while the sum is 49.

The spelling of 27645072718 in words is "twenty-seven billion, six hundred forty-five million, seventy-two thousand, seven hundred eighteen".