84440109721 has 8 divisors (see below), whose sum is σ = 92227879584. Its totient is φ = 76670905920.

The previous prime is 84440109707. The next prime is 84440109839. The reversal of 84440109721 is 12790104448.

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

It is a cyclic number.

It is not a de Polignac number, because 84440109721 - 2¹¹ = 84440107673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84440109121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4632000 + ... + 4650193.

It is an arithmetic number, because the mean of its divisors is an integer number (11528484948).

Almost surely, 2^84440109721 is an apocalyptic number.

It is an amenable number.

84440109721 is a deficient number, since it is larger than the sum of its proper divisors (7787769863).

84440109721 is a wasteful number, since it uses less digits than its factorization.

84440109721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9283031.

The product of its (nonzero) digits is 64512, while the sum is 40.

The spelling of 84440109721 in words is "eighty-four billion, four hundred forty million, one hundred nine thousand, seven hundred twenty-one".