9252721536 has 128 divisors (see below), whose sum is σ = 25928073600. Its totient is φ = 2915481600.

The previous prime is 9252721523. The next prime is 9252721537. The reversal of 9252721536 is 6351272529.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×9252721536² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9252721537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4164906 + ... + 4167126.

It is an arithmetic number, because the mean of its divisors is an integer number (202563075).

Almost surely, 2^9252721536 is an apocalyptic number.

9252721536 is a gapful number since it is divisible by the number (96) 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 9252721536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12964036800).

9252721536 is an abundant number, since it is smaller than the sum of its proper divisors (16675352064).

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

9252721536 is a wasteful number, since it uses less digits than its factorization.

9252721536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2828 (or 2816 counting only the distinct ones).

The product of its digits is 226800, while the sum is 42.

The square root of 9252721536 is about 96191.0678597550. The cubic root of 9252721536 is about 2099.3740792178.

The spelling of 9252721536 in words is "nine billion, two hundred fifty-two million, seven hundred twenty-one thousand, five hundred thirty-six".