27218144979 has 12 divisors (see below), whose sum is σ = 39324928032. Its totient is φ = 18140893200.

The previous prime is 27218144977. The next prime is 27218144981. The reversal of 27218144979 is 97944181272.

27218144979 is a `hidden beast` number, since 2 + 72 + 1 + 81 + 4 + 497 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (27218144977) and next prime (27218144981).

It is not a de Polignac number, because 27218144979 - 2¹ = 27218144977 is a prime.

It is a super-4 number, since 4×27218144979⁴ (a number of 43 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (27218144977) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 339867 + ... + 412244.

It is an arithmetic number, because the mean of its divisors is an integer number (3277077336).

Almost surely, 2^27218144979 is an apocalyptic number.

27218144979 is a deficient number, since it is larger than the sum of its proper divisors (12106783053).

27218144979 is a wasteful number, since it uses less digits than its factorization.

27218144979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756138 (or 756135 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 54.

The spelling of 27218144979 in words is "twenty-seven billion, two hundred eighteen million, one hundred forty-four thousand, nine hundred seventy-nine".