83967139840 has 112 divisors (see below), whose sum is σ = 213364066032. Its totient is φ = 31610896384.

The previous prime is 83967139819. The next prime is 83967139843. The reversal of 83967139840 is 4893176938.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83967139843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 636027 + ... + 756613.

Almost surely, 2^83967139840 is an apocalyptic number.

83967139840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 83967139840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106682033016).

83967139840 is an abundant number, since it is smaller than the sum of its proper divisors (129396926192).

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

83967139840 is a wasteful number, since it uses less digits than its factorization.

83967139840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120635 (or 120611 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 58.

The spelling of 83967139840 in words is "eighty-three billion, nine hundred sixty-seven million, one hundred thirty-nine thousand, eight hundred forty".