27218474779 has 4 divisors (see below), whose sum is σ = 27679804920. Its totient is φ = 26757144640.

The previous prime is 27218474707. The next prime is 27218474797. The reversal of 27218474779 is 97747481272.

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 27218474779 - 2⁷ = 27218474651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27218454779) 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, 230664982 + ... + 230665099.

It is an arithmetic number, because the mean of its divisors is an integer number (6919951230).

Almost surely, 2^27218474779 is an apocalyptic number.

27218474779 is a deficient number, since it is larger than the sum of its proper divisors (461330141).

27218474779 is an equidigital number, since it uses as much as digits as its factorization.

27218474779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461330140.

The product of its digits is 11063808, while the sum is 58.

The spelling of 27218474779 in words is "twenty-seven billion, two hundred eighteen million, four hundred seventy-four thousand, seven hundred seventy-nine".