27781783436 has 36 divisors (see below), whose sum is σ = 53593201200. Its totient is φ = 12591823200.

The previous prime is 27781783433. The next prime is 27781783493. The reversal of 27781783436 is 63438718772.

It is not an unprimeable number, because it can be changed into a prime (27781783433) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 86681 + ... + 251151.

Almost surely, 2^27781783436 is an apocalyptic number.

It is an amenable number.

27781783436 is a deficient number, since it is larger than the sum of its proper divisors (25811417764).

27781783436 is a wasteful number, since it uses less digits than its factorization.

27781783436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164846 (or 164833 counting only the distinct ones).

The product of its digits is 9483264, while the sum is 56.

The spelling of 27781783436 in words is "twenty-seven billion, seven hundred eighty-one million, seven hundred eighty-three thousand, four hundred thirty-six".