83979948990 has 384 divisors, whose sum is σ = 255987164160. Its totient is φ = 17525071872.

The previous prime is 83979948979. The next prime is 83979949049. The reversal of 83979948990 is 9984997938.

It is a Smith number, since the sum of its digits (75) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 95107089 + ... + 95107971.

It is an arithmetic number, because the mean of its divisors is an integer number (666633240).

Almost surely, 2^83979948990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 83979948990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127993582080).

83979948990 is an abundant number, since it is smaller than the sum of its proper divisors (172007215170).

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

83979948990 is a wasteful number, since it uses less digits than its factorization.

83979948990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1056 (or 1049 counting only the distinct ones).

The product of its (nonzero) digits is 317447424, while the sum is 75.

The spelling of 83979948990 in words is "eighty-three billion, nine hundred seventy-nine million, nine hundred forty-eight thousand, nine hundred ninety".