11621752065 has 96 divisors (see below), whose sum is σ = 25148088576. Its totient is φ = 4823470080.

The previous prime is 11621752063. The next prime is 11621752081. The reversal of 11621752065 is 56025712611.

11621752065 is a `hidden beast` number, since 1 + 1 + 62 + 17 + 520 + 65 = 666.

11621752065 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11621752065 - 2¹ = 11621752063 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11621752063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3383589 + ... + 3387021.

It is an arithmetic number, because the mean of its divisors is an integer number (261959256).

Almost surely, 2^11621752065 is an apocalyptic number.

11621752065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11621752065 is an abundant number, since it is smaller than the sum of its proper divisors (13526336511).

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

11621752065 is a wasteful number, since it uses less digits than its factorization.

11621752065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4439 (or 4436 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The spelling of 11621752065 in words is "eleven billion, six hundred twenty-one million, seven hundred fifty-two thousand, sixty-five".