83821287732080 has 40 divisors (see below), whose sum is σ = 206348287743792. Its totient is φ = 31556249498624.

The previous prime is 83821287732047. The next prime is 83821287732137. The reversal of 83821287732080 is 8023778212838.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×83821287732080² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30816648542 + ... + 30816651261.

Almost surely, 2^{83821287732080} is an apocalyptic number.

83821287732080 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

83821287732080 is an abundant number, since it is smaller than the sum of its proper divisors (122527000011712).

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

83821287732080 is a wasteful number, since it uses less digits than its factorization.

83821287732080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61633299833 (or 61633299827 counting only the distinct ones).

The product of its (nonzero) digits is 14450688, while the sum is 59.

The spelling of 83821287732080 in words is "eighty-three trillion, eight hundred twenty-one billion, two hundred eighty-seven million, seven hundred thirty-two thousand, eighty".