27679320749 has 4 divisors (see below), whose sum is σ = 27679711164. Its totient is φ = 27678930336.

The previous prime is 27679320737. The next prime is 27679320769. The reversal of 27679320749 is 94702397672.

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 4602672649 + 23076648100 = 67843^2 + 151910^2 .

It is a cyclic number.

It is not a de Polignac number, because 27679320749 - 2¹⁶ = 27679255213 is a prime.

It is a super-2 number, since 2×27679320749² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27679320694 and 27679320703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27679320769) 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, 55562 + ... + 241755.

It is an arithmetic number, because the mean of its divisors is an integer number (6919927791).

Almost surely, 2^27679320749 is an apocalyptic number.

It is an amenable number.

27679320749 is a deficient number, since it is larger than the sum of its proper divisors (390415).

27679320749 is an equidigital number, since it uses as much as digits as its factorization.

27679320749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390414.

The product of its (nonzero) digits is 8001504, while the sum is 56.

The spelling of 27679320749 in words is "twenty-seven billion, six hundred seventy-nine million, three hundred twenty thousand, seven hundred forty-nine".