27927787679 has 8 divisors (see below), whose sum is σ = 30525161040. Its totient is φ = 25340161600.

The previous prime is 27927787639. The next prime is 27927787691. The reversal of 27927787679 is 97678772972.

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

It is a cyclic number.

It is not a de Polignac number, because 27927787679 - 2⁸ = 27927787423 is a prime.

It is a super-2 number, since 2×27927787679² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27927787639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2430824 + ... + 2442285.

It is an arithmetic number, because the mean of its divisors is an integer number (3815645130).

Almost surely, 2^27927787679 is an apocalyptic number.

27927787679 is a deficient number, since it is larger than the sum of its proper divisors (2597373361).

27927787679 is a wasteful number, since it uses less digits than its factorization.

27927787679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4873641.

The product of its digits is 261382464, while the sum is 71.

The spelling of 27927787679 in words is "twenty-seven billion, nine hundred twenty-seven million, seven hundred eighty-seven thousand, six hundred seventy-nine".