71984794385 has 8 divisors (see below), whose sum is σ = 98722003776. Its totient is φ = 49361001840.

The previous prime is 71984794369. The next prime is 71984794421. The reversal of 71984794385 is 58349748917.

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

It is not a de Polignac number, because 71984794385 - 2⁴ = 71984794369 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1028354171 + ... + 1028354240.

It is an arithmetic number, because the mean of its divisors is an integer number (12340250472).

Almost surely, 2^71984794385 is an apocalyptic number.

It is an amenable number.

71984794385 is a deficient number, since it is larger than the sum of its proper divisors (26737209391).

71984794385 is a wasteful number, since it uses less digits than its factorization.

71984794385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2056708423.

The product of its digits is 60963840, while the sum is 65.

The spelling of 71984794385 in words is "seventy-one billion, nine hundred eighty-four million, seven hundred ninety-four thousand, three hundred eighty-five".