83985568389912 has 64 divisors (see below), whose sum is σ = 240139595473920. Its totient is φ = 23977793818368.

The previous prime is 83985568389887. The next prime is 83985568389917. The reversal of 83985568389912 is 21998386558938.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (84).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83985568389917) 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, 188139573 + ... + 188585444.

It is an arithmetic number, because the mean of its divisors is an integer number (3752181179280).

Almost surely, 2^{83985568389912} is an apocalyptic number.

It is an amenable number.

83985568389912 is an abundant number, since it is smaller than the sum of its proper divisors (156154027084008).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

83985568389912 is a wasteful number, since it uses less digits than its factorization.

83985568389912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376726360 (or 376726356 counting only the distinct ones).

The product of its digits is 8062156800, while the sum is 84.

The spelling of 83985568389912 in words is "eighty-three trillion, nine hundred eighty-five billion, five hundred sixty-eight million, three hundred eighty-nine thousand, nine hundred twelve".