11665205272 has 64 divisors (see below), whose sum is σ = 25156569600. Its totient is φ = 4967550720.

The previous prime is 11665205267. The next prime is 11665205273. The reversal of 11665205272 is 27250256611.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11665205273) 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, 6653548 + ... + 6655300.

It is an arithmetic number, because the mean of its divisors is an integer number (393071400).

Almost surely, 2^11665205272 is an apocalyptic number.

It is an amenable number.

11665205272 is an abundant number, since it is smaller than the sum of its proper divisors (13491364328).

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

11665205272 is a wasteful number, since it uses less digits than its factorization.

11665205272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2456 (or 2452 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 37.

The spelling of 11665205272 in words is "eleven billion, six hundred sixty-five million, two hundred five thousand, two hundred seventy-two".