11643281500 has 48 divisors (see below), whose sum is σ = 25735391136. Its totient is φ = 4601184000.

The previous prime is 11643281423. The next prime is 11643281509. The reversal of 11643281500 is 518234611.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11643281509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98781 + ... + 181780.

It is an arithmetic number, because the mean of its divisors is an integer number (536153982).

Almost surely, 2^11643281500 is an apocalyptic number.

11643281500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11643281500 is an abundant number, since it is smaller than the sum of its proper divisors (14092109636).

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

11643281500 is a wasteful number, since it uses less digits than its factorization.

11643281500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280663 (or 280651 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The spelling of 11643281500 in words is "eleven billion, six hundred forty-three million, two hundred eighty-one thousand, five hundred".