27864736542719 has 4 divisors (see below), whose sum is σ = 27868461284400. Its totient is φ = 27861011801040.

The previous prime is 27864736542691. The next prime is 27864736542767. The reversal of 27864736542719 is 91724563746872.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27864736542719 is a prime.

It is a super-2 number, since 2×27864736542719² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27864736542319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1862359619 + ... + 1862374580.

It is an arithmetic number, because the mean of its divisors is an integer number (6967115321100).

Almost surely, 2^{27864736542719} is an apocalyptic number.

27864736542719 is a deficient number, since it is larger than the sum of its proper divisors (3724741681).

27864736542719 is an equidigital number, since it uses as much as digits as its factorization.

27864736542719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3724741680.

The product of its digits is 853493760, while the sum is 71.

The spelling of 27864736542719 in words is "twenty-seven trillion, eight hundred sixty-four billion, seven hundred thirty-six million, five hundred forty-two thousand, seven hundred nineteen".