27663163664 has 20 divisors (see below), whose sum is σ = 55045958604. Its totient is φ = 13457755008.

The previous prime is 27663163663. The next prime is 27663163687. The reversal of 27663163664 is 46636136672.

It can be written as a sum of positive squares in 2 ways, for example, as 16322617600 + 11340546064 = 127760^2 + 106492^2 .

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (27663163663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23363567 + ... + 23364750.

Almost surely, 2^27663163664 is an apocalyptic number.

It is an amenable number.

27663163664 is a deficient number, since it is larger than the sum of its proper divisors (27382794940).

27663163664 is a wasteful number, since it uses less digits than its factorization.

27663163664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46728362 (or 46728356 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 50.

The spelling of 27663163664 in words is "twenty-seven billion, six hundred sixty-three million, one hundred sixty-three thousand, six hundred sixty-four".