27220765635 has 80 divisors (see below), whose sum is σ = 55999365312. Its totient is φ = 12391833600.

The previous prime is 27220765601. The next prime is 27220765657. The reversal of 27220765635 is 53656702272.

27220765635 is a `hidden beast` number, since 2 + 7 + 2 + 2 + 0 + 7 + 6 + 5 + 635 = 666.

It is not a de Polignac number, because 27220765635 - 2²⁹ = 26683894723 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 663315 + ... + 703155.

Almost surely, 2^27220765635 is an apocalyptic number.

27220765635 is an abundant number, since it is smaller than the sum of its proper divisors (28778599677).

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

27220765635 is a wasteful number, since it uses less digits than its factorization.

27220765635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40106 (or 40097 counting only the distinct ones).

The product of its (nonzero) digits is 1058400, while the sum is 45.

The spelling of 27220765635 in words is "twenty-seven billion, two hundred twenty million, seven hundred sixty-five thousand, six hundred thirty-five".