11664943820 has 24 divisors (see below), whose sum is σ = 24539457600. Its totient is φ = 4657772672.

The previous prime is 11664943811. The next prime is 11664943831. The reversal of 11664943820 is 2834946611.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 501140 + ... + 523899.

It is an arithmetic number, because the mean of its divisors is an integer number (1022477400).

Almost surely, 2^11664943820 is an apocalyptic number.

11664943820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11664943820 is an abundant number, since it is smaller than the sum of its proper divisors (12874513780).

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

11664943820 is a wasteful number, since it uses less digits than its factorization.

11664943820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1025617 (or 1025615 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 44.

The spelling of 11664943820 in words is "eleven billion, six hundred sixty-four million, nine hundred forty-three thousand, eight hundred twenty".