11975065533 has 12 divisors (see below), whose sum is σ = 18207702240. Its totient is φ = 7563199176.

The previous prime is 11975065517. The next prime is 11975065537. The reversal of 11975065533 is 33556057911.

11975065533 is a `hidden beast` number, since 1 + 1 + 9 + 7 + 50 + 65 + 533 = 666.

It is not a de Polignac number, because 11975065533 - 2⁴ = 11975065517 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11975065537) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35014641 + ... + 35014982.

It is an arithmetic number, because the mean of its divisors is an integer number (1517308520).

Almost surely, 2^11975065533 is an apocalyptic number.

It is an amenable number.

11975065533 is a deficient number, since it is larger than the sum of its proper divisors (6232636707).

11975065533 is a wasteful number, since it uses less digits than its factorization.

11975065533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70029648 (or 70029645 counting only the distinct ones).

The product of its (nonzero) digits is 425250, while the sum is 45.

The spelling of 11975065533 in words is "eleven billion, nine hundred seventy-five million, sixty-five thousand, five hundred thirty-three".