83680770648 has 96 divisors (see below), whose sum is σ = 221330773440. Its totient is φ = 26359037760.

The previous prime is 83680770637. The next prime is 83680770661. The reversal of 83680770648 is 84607708638.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1014063 + ... + 1093473.

It is an arithmetic number, because the mean of its divisors is an integer number (2305528890).

Almost surely, 2^83680770648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 83680770648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110665386720).

83680770648 is an abundant number, since it is smaller than the sum of its proper divisors (137650002792).

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

83680770648 is a wasteful number, since it uses less digits than its factorization.

83680770648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79549 (or 79522 counting only the distinct ones).

The product of its (nonzero) digits is 10838016, while the sum is 57.

The spelling of 83680770648 in words is "eighty-three billion, six hundred eighty million, seven hundred seventy thousand, six hundred forty-eight".