11643397632 has 120 divisors (see below), whose sum is σ = 34688047680. Its totient is φ = 3755888640.

The previous prime is 11643397567. The next prime is 11643397639. The reversal of 11643397632 is 23679334611.

11643397632 is a `hidden beast` number, since 1 + 1 + 6 + 4 + 3 + 3 + 9 + 7 + 632 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11643397639) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 102094 + ... + 183602.

It is an arithmetic number, because the mean of its divisors is an integer number (289067064).

Almost surely, 2^11643397632 is an apocalyptic number.

11643397632 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 11643397632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17344023840).

11643397632 is an abundant number, since it is smaller than the sum of its proper divisors (23044650048).

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

11643397632 is an equidigital number, since it uses as much as digits as its factorization.

11643397632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81564 (or 81545 counting only the distinct ones).

The product of its digits is 489888, while the sum is 45.

The spelling of 11643397632 in words is "eleven billion, six hundred forty-three million, three hundred ninety-seven thousand, six hundred thirty-two".