44543383891 has 4 divisors (see below), whose sum is σ = 44543832984. Its totient is φ = 44542934800.

The previous prime is 44543383889. The next prime is 44543383909. The reversal of 44543383891 is 19838334544.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 44543383891 - 2¹ = 44543383889 is a prime.

It is a super-2 number, since 2×44543383891² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (44543383691) 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, 2725 + ... + 298486.

It is an arithmetic number, because the mean of its divisors is an integer number (11135958246).

Almost surely, 2^44543383891 is an apocalyptic number.

44543383891 is a deficient number, since it is larger than the sum of its proper divisors (449093).

44543383891 is a wasteful number, since it uses less digits than its factorization.

44543383891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449092.

The product of its digits is 4976640, while the sum is 52.

The spelling of 44543383891 in words is "forty-four billion, five hundred forty-three million, three hundred eighty-three thousand, eight hundred ninety-one".