27664456373 has 4 divisors (see below), whose sum is σ = 28867258848. Its totient is φ = 26461653900.

The previous prime is 27664456367. The next prime is 27664456411. The reversal of 27664456373 is 37365446672.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 27664456373 - 2¹⁰ = 27664455349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27664446373) 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 3 ways as a sum of consecutive naturals, for example, 601401203 + ... + 601401248.

It is an arithmetic number, because the mean of its divisors is an integer number (7216814712).

Almost surely, 2^27664456373 is an apocalyptic number.

27664456373 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

27664456373 is a deficient number, since it is larger than the sum of its proper divisors (1202802475).

27664456373 is a wasteful number, since it uses less digits than its factorization.

27664456373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1202802474.

The product of its digits is 15240960, while the sum is 53.

The spelling of 27664456373 in words is "twenty-seven billion, six hundred sixty-four million, four hundred fifty-six thousand, three hundred seventy-three".