11965539040 has 96 divisors (see below), whose sum is σ = 34792148160. Its totient is φ = 3786891264.

The previous prime is 11965539031. The next prime is 11965539041. The reversal of 11965539040 is 4093556911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11965539041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 396345 + ... + 425464.

It is an arithmetic number, because the mean of its divisors is an integer number (362418210).

Almost surely, 2^11965539040 is an apocalyptic number.

11965539040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11965539040 is an abundant number, since it is smaller than the sum of its proper divisors (22826609120).

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

11965539040 is a wasteful number, since it uses less digits than its factorization.

11965539040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821844 (or 821836 counting only the distinct ones).

The product of its (nonzero) digits is 145800, while the sum is 43.

The spelling of 11965539040 in words is "eleven billion, nine hundred sixty-five million, five hundred thirty-nine thousand, forty".