11631065540 has 24 divisors (see below), whose sum is σ = 24580819032. Its totient is φ = 4622791680.

The previous prime is 11631065539. The next prime is 11631065543. The reversal of 11631065540 is 4556013611.

It can be written as a sum of positive squares in 4 ways, for example, as 509675776 + 11121389764 = 22576^2 + 105458^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11631065497 and 11631065506.

It is not an unprimeable number, because it can be changed into a prime (11631065543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1848941 + ... + 1855220.

It is an arithmetic number, because the mean of its divisors is an integer number (1024200793).

Almost surely, 2^11631065540 is an apocalyptic number.

11631065540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11631065540 is an abundant number, since it is smaller than the sum of its proper divisors (12949753492).

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

11631065540 is a wasteful number, since it uses less digits than its factorization.

11631065540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3704327 (or 3704325 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 32.

The spelling of 11631065540 in words is "eleven billion, six hundred thirty-one million, sixty-five thousand, five hundred forty".