27664723745 has 8 divisors (see below), whose sum is σ = 33502234920. Its totient is φ = 21928734720.

The previous prime is 27664723703. The next prime is 27664723759. The reversal of 27664723745 is 54732746672.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5246249761 + 22418473984 = 72431^2 + 149728^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 27664723745 - 2¹⁰ = 27664722721 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25379936 + ... + 25381025.

It is an arithmetic number, because the mean of its divisors is an integer number (4187779365).

Almost surely, 2^27664723745 is an apocalyptic number.

It is an amenable number.

27664723745 is a deficient number, since it is larger than the sum of its proper divisors (5837511175).

27664723745 is a wasteful number, since it uses less digits than its factorization.

27664723745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50761075.

The product of its digits is 11854080, while the sum is 53.

The spelling of 27664723745 in words is "twenty-seven billion, six hundred sixty-four million, seven hundred twenty-three thousand, seven hundred forty-five".