4278744894091 has 24 divisors (see below), whose sum is σ = 4785176632320. Its totient is φ = 3812113933056.

The previous prime is 4278744894079. The next prime is 4278744894161. The reversal of 4278744894091 is 1904984478724.

It is not a de Polignac number, because 4278744894091 - 2²⁷ = 4278610676363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4278744894191) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7576665 + ... + 8121781.

It is an arithmetic number, because the mean of its divisors is an integer number (199382359680).

Almost surely, 2^{4278744894091} is an apocalyptic number.

4278744894091 is a deficient number, since it is larger than the sum of its proper divisors (506431738229).

4278744894091 is a wasteful number, since it uses less digits than its factorization.

4278744894091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546451 (or 546432 counting only the distinct ones).

The product of its (nonzero) digits is 130056192, while the sum is 67.

The spelling of 4278744894091 in words is "four trillion, two hundred seventy-eight billion, seven hundred forty-four million, eight hundred ninety-four thousand, ninety-one".