84244393791 has 16 divisors (see below), whose sum is σ = 124960433920. Its totient is φ = 56093663160.

The previous prime is 84244393789. The next prime is 84244393799. The reversal of 84244393791 is 19739344248.

84244393791 is a `hidden beast` number, since 8 + 4 + 244 + 393 + 7 + 9 + 1 = 666.

It is not a de Polignac number, because 84244393791 - 2¹ = 84244393789 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 (84244393799) 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, 1901755 + ... + 1945548.

It is an arithmetic number, because the mean of its divisors is an integer number (7810027120).

Almost surely, 2^84244393791 is an apocalyptic number.

84244393791 is a deficient number, since it is larger than the sum of its proper divisors (40716040129).

84244393791 is a wasteful number, since it uses less digits than its factorization.

84244393791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3848123 (or 3848117 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 54.

The spelling of 84244393791 in words is "eighty-four billion, two hundred forty-four million, three hundred ninety-three thousand, seven hundred ninety-one".