82985985478 has 8 divisors (see below), whose sum is σ = 135795249000. Its totient is φ = 37720902480.

The previous prime is 82985985449. The next prime is 82985985479. The reversal of 82985985478 is 87458958928.

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

It is a self number, because there is not a number n which added to its sum of digits gives 82985985478.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82985985479) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1886045103 + ... + 1886045146.

It is an arithmetic number, because the mean of its divisors is an integer number (16974406125).

Almost surely, 2^82985985478 is an apocalyptic number.

82985985478 is a deficient number, since it is larger than the sum of its proper divisors (52809263522).

82985985478 is a wasteful number, since it uses less digits than its factorization.

82985985478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3772090262.

The product of its digits is 464486400, while the sum is 73.

The spelling of 82985985478 in words is "eighty-two billion, nine hundred eighty-five million, nine hundred eighty-five thousand, four hundred seventy-eight".