27864662447 has 16 divisors (see below), whose sum is σ = 29873188800. Its totient is φ = 25898534400.

The previous prime is 27864662437. The next prime is 27864662453. The reversal of 27864662447 is 74426646872.

It is a happy number.

It is not a de Polignac number, because 27864662447 - 2³² = 23569695151 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27864662392 and 27864662401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27864662407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 647054 + ... + 688772.

It is an arithmetic number, because the mean of its divisors is an integer number (1867074300).

Almost surely, 2^27864662447 is an apocalyptic number.

27864662447 is a deficient number, since it is larger than the sum of its proper divisors (2008526353).

27864662447 is a wasteful number, since it uses less digits than its factorization.

27864662447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42226.

The product of its digits is 21676032, while the sum is 56.

The spelling of 27864662447 in words is "twenty-seven billion, eight hundred sixty-four million, six hundred sixty-two thousand, four hundred forty-seven".