99821104552 has 128 divisors (see below), whose sum is σ = 214407648000. Its totient is φ = 43216588800.

The previous prime is 99821104531. The next prime is 99821104553. The reversal of 99821104552 is 25540112899.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is not an unprimeable number, because it can be changed into a prime (99821104553) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98930224 + ... + 98931232.

It is an arithmetic number, because the mean of its divisors is an integer number (1675059750).

Almost surely, 2^99821104552 is an apocalyptic number.

99821104552 is a gapful number since it is divisible by the number (92) formed by its first and last digit.

99821104552 is the 257968-th pentagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99821104552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107203824000).

99821104552 is an abundant number, since it is smaller than the sum of its proper divisors (114586543448).

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

99821104552 is a wasteful number, since it uses less digits than its factorization.

99821104552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1811 (or 1807 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 46.

The spelling of 99821104552 in words is "ninety-nine billion, eight hundred twenty-one million, one hundred four thousand, five hundred fifty-two".