27808238945 has 8 divisors (see below), whose sum is σ = 33513106536. Its totient is φ = 22151111296.

The previous prime is 27808238917. The next prime is 27808238951. The reversal of 27808238945 is 54983280872.

It can be written as a sum of positive squares in 4 ways, for example, as 2130099409 + 25678139536 = 46153^2 + 160244^2 .

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 27808238945 - 2¹⁶ = 27808173409 is a prime.

It is a Duffinian number.

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, 11933702 + ... + 11936031.

It is an arithmetic number, because the mean of its divisors is an integer number (4189138317).

Almost surely, 2^27808238945 is an apocalyptic number.

It is an amenable number.

27808238945 is a deficient number, since it is larger than the sum of its proper divisors (5704867591).

27808238945 is a wasteful number, since it uses less digits than its factorization.

27808238945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23869971.

The product of its (nonzero) digits is 7741440, while the sum is 56.

The spelling of 27808238945 in words is "twenty-seven billion, eight hundred eight million, two hundred thirty-eight thousand, nine hundred forty-five".