11669945520 has 80 divisors (see below), whose sum is σ = 36196826112. Its totient is φ = 3110265600.

The previous prime is 11669945513. The next prime is 11669945531. The reversal of 11669945520 is 2554996611.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 11669945520.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 455779 + ... + 480701.

Almost surely, 2^11669945520 is an apocalyptic number.

11669945520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11669945520 is an abundant number, since it is smaller than the sum of its proper divisors (24526880592).

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

11669945520 is a wasteful number, since it uses less digits than its factorization.

11669945520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26890 (or 26884 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 48.

The spelling of 11669945520 in words is "eleven billion, six hundred sixty-nine million, nine hundred forty-five thousand, five hundred twenty".