84739990809 has 16 divisors (see below), whose sum is σ = 113518080000. Its totient is φ = 56227859856.

The previous prime is 84739990801. The next prime is 84739990837. The reversal of 84739990809 is 90809993748.

It is not a de Polignac number, because 84739990809 - 2³ = 84739990801 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 84739990809.

It is not an unprimeable number, because it can be changed into a prime (84739990801) 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, 1403722 + ... + 1462844.

It is an arithmetic number, because the mean of its divisors is an integer number (7094880000).

Almost surely, 2^84739990809 is an apocalyptic number.

It is an amenable number.

84739990809 is a deficient number, since it is larger than the sum of its proper divisors (28778089191).

84739990809 is a wasteful number, since it uses less digits than its factorization.

84739990809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61364.

The product of its (nonzero) digits is 35271936, while the sum is 66.

The spelling of 84739990809 in words is "eighty-four billion, seven hundred thirty-nine million, nine hundred ninety thousand, eight hundred nine".