4044254551891 has 8 divisors (see below), whose sum is σ = 4085667079920. Its totient is φ = 4002908982528.

The previous prime is 4044254551871. The next prime is 4044254551933. The reversal of 4044254551891 is 1981554524404.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4044254551891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4044254551861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16618246 + ... + 16859851.

It is an arithmetic number, because the mean of its divisors is an integer number (510708384990).

Almost surely, 2^{4044254551891} is an apocalyptic number.

4044254551891 is a deficient number, since it is larger than the sum of its proper divisors (41412528029).

4044254551891 is a wasteful number, since it uses less digits than its factorization.

4044254551891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33479333.

The product of its (nonzero) digits is 4608000, while the sum is 52.

The spelling of 4044254551891 in words is "four trillion, forty-four billion, two hundred fifty-four million, five hundred fifty-one thousand, eight hundred ninety-one".