83640780065832 has 64 divisors (see below), whose sum is σ = 229907369779200. Its totient is φ = 25146118549440.

The previous prime is 83640780065819. The next prime is 83640780065867. The reversal of 83640780065832 is 23856008704638.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1247293782 + ... + 1247360837.

It is an arithmetic number, because the mean of its divisors is an integer number (3592302652800).

Almost surely, 2^{83640780065832} is an apocalyptic number.

It is an amenable number.

83640780065832 is an abundant number, since it is smaller than the sum of its proper divisors (146266589713368).

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

83640780065832 is a wasteful number, since it uses less digits than its factorization.

83640780065832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2494654766 (or 2494654762 counting only the distinct ones).

The product of its (nonzero) digits is 46448640, while the sum is 60.

The spelling of 83640780065832 in words is "eighty-three trillion, six hundred forty billion, seven hundred eighty million, sixty-five thousand, eight hundred thirty-two".