10999863252 has 144 divisors (see below), whose sum is σ = 33238732800. Its totient is φ = 2998949184.

The previous prime is 10999863223. The next prime is 10999863253. The reversal of 10999863252 is 25236899901.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10999863253) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2681499 + ... + 2685597.

Almost surely, 2^10999863252 is an apocalyptic number.

10999863252 is a gapful number since it is divisible by the number (12) 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 10999863252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16619366400).

10999863252 is an abundant number, since it is smaller than the sum of its proper divisors (22238869548).

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

10999863252 is a wasteful number, since it uses less digits than its factorization.

10999863252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4602 (or 4597 counting only the distinct ones).

The product of its (nonzero) digits is 2099520, while the sum is 54.

The spelling of 10999863252 in words is "ten billion, nine hundred ninety-nine million, eight hundred sixty-three thousand, two hundred fifty-two".