99820838580 has 96 divisors (see below), whose sum is σ = 296593920000. Its totient is φ = 25029975168.

The previous prime is 99820838543. The next prime is 99820838599. The reversal of 99820838580 is 8583802899.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 531580 + ... + 694419.

It is an arithmetic number, because the mean of its divisors is an integer number (3089520000).

Almost surely, 2^99820838580 is an apocalyptic number.

It is an amenable number.

99820838580 is an abundant number, since it is smaller than the sum of its proper divisors (196773081420).

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

99820838580 is a wasteful number, since it uses less digits than its factorization.

99820838580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1226093 (or 1226091 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 60.

The spelling of 99820838580 in words is "ninety-nine billion, eight hundred twenty million, eight hundred thirty-eight thousand, five hundred eighty".