27890374679 has 4 divisors (see below), whose sum is σ = 27905219760. Its totient is φ = 27875529600.

The previous prime is 27890374663. The next prime is 27890374691. The reversal of 27890374679 is 97647309872.

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

It is a cyclic number.

It is not a de Polignac number, because 27890374679 - 2⁴ = 27890374663 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 (27890374639) 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, 7419722 + ... + 7423479.

It is an arithmetic number, because the mean of its divisors is an integer number (6976304940).

Almost surely, 2^27890374679 is an apocalyptic number.

27890374679 is a deficient number, since it is larger than the sum of its proper divisors (14845081).

27890374679 is a wasteful number, since it uses less digits than its factorization.

27890374679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14845080.

The product of its (nonzero) digits is 32006016, while the sum is 62.

The spelling of 27890374679 in words is "twenty-seven billion, eight hundred ninety million, three hundred seventy-four thousand, six hundred seventy-nine".