445842189991 has 8 divisors (see below), whose sum is σ = 486389808000. Its totient is φ = 405297323640.

The previous prime is 445842189977. The next prime is 445842190039. The reversal of 445842189991 is 199981248544.

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

It is a de Polignac number, because none of the positive numbers 2^k-445842189991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445842189931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 341541 + ... + 1004158.

It is an arithmetic number, because the mean of its divisors is an integer number (60798726000).

Almost surely, 2^445842189991 is an apocalyptic number.

445842189991 is a deficient number, since it is larger than the sum of its proper divisors (40547618009).

445842189991 is a wasteful number, since it uses less digits than its factorization.

445842189991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1375829.

The product of its digits is 29859840, while the sum is 64.

The spelling of 445842189991 in words is "four hundred forty-five billion, eight hundred forty-two million, one hundred eighty-nine thousand, nine hundred ninety-one".