9115421952 has 432 divisors, whose sum is σ = 30642339840. Its totient is φ = 2354946048.

The previous prime is 9115421941. The next prime is 9115421993. The reversal of 9115421952 is 2591245119.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 9115421952.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 71774913 + ... + 71775039.

Almost surely, 2^9115421952 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 9115421952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15321169920).

9115421952 is an abundant number, since it is smaller than the sum of its proper divisors (21526917888).

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

9115421952 is a wasteful number, since it uses less digits than its factorization.

9115421952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258 (or 231 counting only the distinct ones).

The product of its digits is 32400, while the sum is 39.

The square root of 9115421952 is about 95474.7189155328. The cubic root of 9115421952 is about 2088.9382022931.

The spelling of 9115421952 in words is "nine billion, one hundred fifteen million, four hundred twenty-one thousand, nine hundred fifty-two".