11532532640 has 24 divisors (see below), whose sum is σ = 27245608740. Its totient is φ = 4613012992.

The previous prime is 11532532637. The next prime is 11532532663. The reversal of 11532532640 is 4623523511.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11167416976 + 365115664 = 105676^2 + 19108^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 11532532597 and 11532532606.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36039005 + ... + 36039324.

Almost surely, 2^11532532640 is an apocalyptic number.

11532532640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11532532640 is an abundant number, since it is smaller than the sum of its proper divisors (15713076100).

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

11532532640 is an equidigital number, since it uses as much as digits as its factorization.

11532532640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72078344 (or 72078336 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

The spelling of 11532532640 in words is "eleven billion, five hundred thirty-two million, five hundred thirty-two thousand, six hundred forty".