9999613952 has 144 divisors (see below), whose sum is σ = 21743188992. Its totient is φ = 4584898560.

The previous prime is 9999613951. The next prime is 9999613973. The reversal of 9999613952 is 2593169999.

It is a Harshad number since it is a multiple of its sum of digits (62).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9999613951) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93454283 + ... + 93454389.

It is an arithmetic number, because the mean of its divisors is an integer number (150994368).

Almost surely, 2^9999613952 is an apocalyptic number.

9999613952 is a gapful number since it is divisible by the number (92) 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 9999613952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10871594496).

9999613952 is an abundant number, since it is smaller than the sum of its proper divisors (11743575040).

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

9999613952 is an equidigital number, since it uses as much as digits as its factorization.

9999613952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195 (or 163 counting only the distinct ones).

The product of its digits is 10628820, while the sum is 62.

The square root of 9999613952 is about 99998.0697413705. The cubic root of 9999613952 is about 2154.4069658350.

The spelling of 9999613952 in words is "nine billion, nine hundred ninety-nine million, six hundred thirteen thousand, nine hundred fifty-two".