83800921278 has 16 divisors (see below), whose sum is σ = 167738898816. Its totient is φ = 27910797720.

The previous prime is 83800921247. The next prime is 83800921279. The reversal of 83800921278 is 87212900838.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83800921279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5702728 + ... + 5717403.

It is an arithmetic number, because the mean of its divisors is an integer number (10483681176).

Almost surely, 2^83800921278 is an apocalyptic number.

83800921278 is an abundant number, since it is smaller than the sum of its proper divisors (83937977538).

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

83800921278 is a wasteful number, since it uses less digits than its factorization.

83800921278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11421359.

The product of its (nonzero) digits is 387072, while the sum is 48.

The spelling of 83800921278 in words is "eighty-three billion, eight hundred million, nine hundred twenty-one thousand, two hundred seventy-eight".