27640435236 has 24 divisors (see below), whose sum is σ = 65271391584. Its totient is φ = 9102472320.

The previous prime is 27640435223. The next prime is 27640435241. The reversal of 27640435236 is 63253404672.

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, 13874725 + ... + 13876716.

It is an arithmetic number, because the mean of its divisors is an integer number (2719641316).

Almost surely, 2^27640435236 is an apocalyptic number.

It is an amenable number.

27640435236 is an abundant number, since it is smaller than the sum of its proper divisors (37630956348).

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

27640435236 is a wasteful number, since it uses less digits than its factorization.

27640435236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27751531 (or 27751529 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 42.

The spelling of 27640435236 in words is "twenty-seven billion, six hundred forty million, four hundred thirty-five thousand, two hundred thirty-six".