99807287580 has 432 divisors, whose sum is σ = 413751802464. Its totient is φ = 19143613440.

The previous prime is 99807287561. The next prime is 99807287581. The reversal of 99807287580 is 8578270899.

It is a super-2 number, since 2×99807287580² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99807287581) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1221694 + ... + 1300826.

It is an arithmetic number, because the mean of its divisors is an integer number (957758802).

Almost surely, 2^99807287580 is an apocalyptic number.

99807287580 is a gapful number since it is divisible by the number (90) 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 99807287580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (206875901232).

99807287580 is an abundant number, since it is smaller than the sum of its proper divisors (313944514884).

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

99807287580 is a wasteful number, since it uses less digits than its factorization.

99807287580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79186 (or 79174 counting only the distinct ones).

The product of its (nonzero) digits is 20321280, while the sum is 63.

The spelling of 99807287580 in words is "ninety-nine billion, eight hundred seven million, two hundred eighty-seven thousand, five hundred eighty".