27679288793 has 4 divisors (see below), whose sum is σ = 29808464868. Its totient is φ = 25550112720.

The previous prime is 27679288753. The next prime is 27679288807. The reversal of 27679288793 is 39788297672.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3564925849 + 24114362944 = 59707^2 + 155288^2 .

It is a cyclic number.

It is not a de Polignac number, because 27679288793 - 2⁸ = 27679288537 is a prime.

It is a super-2 number, since 2×27679288793² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (27679288753) 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, 1064588018 + ... + 1064588043.

It is an arithmetic number, because the mean of its divisors is an integer number (7452116217).

Almost surely, 2^27679288793 is an apocalyptic number.

It is an amenable number.

27679288793 is a deficient number, since it is larger than the sum of its proper divisors (2129176075).

27679288793 is a wasteful number, since it uses less digits than its factorization.

27679288793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2129176074.

The product of its digits is 128024064, while the sum is 68.

The spelling of 27679288793 in words is "twenty-seven billion, six hundred seventy-nine million, two hundred eighty-eight thousand, seven hundred ninety-three".