83971889140 has 48 divisors (see below), whose sum is σ = 176841721728. Its totient is φ = 33493509504.

The previous prime is 83971889117. The next prime is 83971889153. The reversal of 83971889140 is 4198817938.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12303769 + ... + 12310591.

It is an arithmetic number, because the mean of its divisors is an integer number (3684202536).

Almost surely, 2^83971889140 is an apocalyptic number.

It is an amenable number.

83971889140 is an abundant number, since it is smaller than the sum of its proper divisors (92869832588).

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

83971889140 is a wasteful number, since it uses less digits than its factorization.

83971889140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8488 (or 8486 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 58.

The spelling of 83971889140 in words is "eighty-three billion, nine hundred seventy-one million, eight hundred eighty-nine thousand, one hundred forty".