9899412432 has 160 divisors (see below), whose sum is σ = 31619309568. Its totient is φ = 2598870528.

The previous prime is 9899412431. The next prime is 9899412521. The reversal of 9899412432 is 2342149989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9899412431) 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, 968983 + ... + 979145.

Almost surely, 2^9899412432 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 9899412432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15809654784).

9899412432 is an abundant number, since it is smaller than the sum of its proper divisors (21719897136).

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

9899412432 is a wasteful number, since it uses less digits than its factorization.

9899412432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10417 (or 10411 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 51.

The square root of 9899412432 is about 99495.7910265555. The cubic root of 9899412432 is about 2147.1866886112.

The spelling of 9899412432 in words is "nine billion, eight hundred ninety-nine million, four hundred twelve thousand, four hundred thirty-two".