9646237440 has 864 divisors, whose sum is σ = 40567153536. Its totient is φ = 2070282240.

The previous prime is 9646237423. The next prime is 9646237441. The reversal of 9646237440 is 447326469.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9646237441) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 158135010 + ... + 158135070.

It is an arithmetic number, because the mean of its divisors is an integer number (46952724).

Almost surely, 2^9646237440 is an apocalyptic number.

9646237440 is a gapful number since it is divisible by the number (90) 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 9646237440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20283576768).

9646237440 is an abundant number, since it is smaller than the sum of its proper divisors (30920916096).

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

9646237440 is a wasteful number, since it uses less digits than its factorization.

9646237440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185 (or 168 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 45.

The square root of 9646237440 is about 98215.2607286668. The cubic root of 9646237440 is about 2128.7238007438.

The spelling of 9646237440 in words is "nine billion, six hundred forty-six million, two hundred thirty-seven thousand, four hundred forty".