27918516645789 has 32 divisors (see below), whose sum is σ = 46869506703360. Its totient is φ = 14359530216000.

The previous prime is 27918516645751. The next prime is 27918516645809. The reversal of 27918516645789 is 98754661581972.

It is not a de Polignac number, because 27918516645789 - 2¹³ = 27918516637597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27918516645709) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 598290429 + ... + 598337090.

It is an arithmetic number, because the mean of its divisors is an integer number (1464672084480).

Almost surely, 2^{27918516645789} is an apocalyptic number.

It is an amenable number.

27918516645789 is a deficient number, since it is larger than the sum of its proper divisors (18950990057571).

27918516645789 is a wasteful number, since it uses less digits than its factorization.

27918516645789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1196627641.

The product of its digits is 1828915200, while the sum is 78.

The spelling of 27918516645789 in words is "twenty-seven trillion, nine hundred eighteen billion, five hundred sixteen million, six hundred forty-five thousand, seven hundred eighty-nine".