84091944945 has 16 divisors (see below), whose sum is σ = 134633786112. Its totient is φ = 44820145920.

The previous prime is 84091944917. The next prime is 84091944947. The reversal of 84091944945 is 54944919048.

It is a happy number.

It is not a de Polignac number, because 84091944945 - 2⁵ = 84091944913 is a prime.

It is a super-2 number, since 2×84091944945² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (84091944947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1781641 + ... + 1828230.

It is an arithmetic number, because the mean of its divisors is an integer number (8414611632).

Almost surely, 2^84091944945 is an apocalyptic number.

It is an amenable number.

84091944945 is a deficient number, since it is larger than the sum of its proper divisors (50541841167).

84091944945 is a wasteful number, since it uses less digits than its factorization.

84091944945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3611432.

The product of its (nonzero) digits is 7464960, while the sum is 57.

The spelling of 84091944945 in words is "eighty-four billion, ninety-one million, nine hundred forty-four thousand, nine hundred forty-five".