27664105475 has 12 divisors (see below), whose sum is σ = 34305602664. Its totient is φ = 22129921920.

The previous prime is 27664105471. The next prime is 27664105487. The reversal of 27664105475 is 57450146672.

It is not a de Polignac number, because 27664105475 - 2² = 27664105471 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27664105471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 647732 + ... + 689118.

It is an arithmetic number, because the mean of its divisors is an integer number (2858800222).

Almost surely, 2^27664105475 is an apocalyptic number.

27664105475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

27664105475 is a deficient number, since it is larger than the sum of its proper divisors (6641497189).

27664105475 is a wasteful number, since it uses less digits than its factorization.

27664105475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68134 (or 68129 counting only the distinct ones).

The product of its (nonzero) digits is 1411200, while the sum is 47.

The spelling of 27664105475 in words is "twenty-seven billion, six hundred sixty-four million, one hundred five thousand, four hundred seventy-five".