99286988640 has 384 divisors, whose sum is σ = 366071021568. Its totient is φ = 22148536320.

The previous prime is 99286988597. The next prime is 99286988653. The reversal of 99286988640 is 4688968299.

It is a super-2 number, since 2×99286988640² (a number of 23 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 63 ways as a sum of consecutive naturals, for example, 76906395 + ... + 76907685.

It is an arithmetic number, because the mean of its divisors is an integer number (953309952).

Almost surely, 2^99286988640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99286988640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (183035510784).

99286988640 is an abundant number, since it is smaller than the sum of its proper divisors (266784032928).

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

99286988640 is a wasteful number, since it uses less digits than its factorization.

99286988640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1850 (or 1842 counting only the distinct ones).

The product of its (nonzero) digits is 107495424, while the sum is 69.

The spelling of 99286988640 in words is "ninety-nine billion, two hundred eighty-six million, nine hundred eighty-eight thousand, six hundred forty".