44742890191 has 4 divisors (see below), whose sum is σ = 44777602800. Its totient is φ = 44708177584.

The previous prime is 44742890113. The next prime is 44742890239. The reversal of 44742890191 is 19109824744.

It is a happy number.

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 44742890191 - 2¹³ = 44742881999 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44742894191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17354371 + ... + 17356948.

It is an arithmetic number, because the mean of its divisors is an integer number (11194400700).

Almost surely, 2^44742890191 is an apocalyptic number.

44742890191 is a deficient number, since it is larger than the sum of its proper divisors (34712609).

44742890191 is a wasteful number, since it uses less digits than its factorization.

44742890191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34712608.

The product of its (nonzero) digits is 580608, while the sum is 49.

The spelling of 44742890191 in words is "forty-four billion, seven hundred forty-two million, eight hundred ninety thousand, one hundred ninety-one".