27472312665 has 24 divisors (see below), whose sum is σ = 54421343808. Its totient is φ = 12558771360.

The previous prime is 27472312663. The next prime is 27472312697. The reversal of 27472312665 is 56621327472.

27472312665 is a `hidden beast` number, since 274 + 7 + 2 + 312 + 6 + 65 = 666.

It is not a de Polignac number, because 27472312665 - 2¹ = 27472312663 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 27472312665.

It is not an unprimeable number, because it can be changed into a prime (27472312663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43606531 + ... + 43607160.

It is an arithmetic number, because the mean of its divisors is an integer number (2267555992).

Almost surely, 2^27472312665 is an apocalyptic number.

It is an amenable number.

27472312665 is a deficient number, since it is larger than the sum of its proper divisors (26949031143).

27472312665 is a wasteful number, since it uses less digits than its factorization.

27472312665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87213709 (or 87213706 counting only the distinct ones).

The product of its digits is 846720, while the sum is 45.

The spelling of 27472312665 in words is "twenty-seven billion, four hundred seventy-two million, three hundred twelve thousand, six hundred sixty-five".