11643781580 has 12 divisors (see below), whose sum is σ = 24451941360. Its totient is φ = 4657512624.

The previous prime is 11643781573. The next prime is 11643781631. The reversal of 11643781580 is 8518734611.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 291094520 + ... + 291094559.

It is an arithmetic number, because the mean of its divisors is an integer number (2037661780).

Almost surely, 2^11643781580 is an apocalyptic number.

11643781580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11643781580 is an abundant number, since it is smaller than the sum of its proper divisors (12808159780).

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

11643781580 is a wasteful number, since it uses less digits than its factorization.

11643781580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 582189088 (or 582189086 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 44.

The spelling of 11643781580 in words is "eleven billion, six hundred forty-three million, seven hundred eighty-one thousand, five hundred eighty".