12633771533 has 4 divisors (see below), whose sum is σ = 12645083100. Its totient is φ = 12622459968.

The previous prime is 12633771509. The next prime is 12633771541. The reversal of 12633771533 is 33517733621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4854884329 + 7778887204 = 69677^2 + 88198^2 .

It is a cyclic number.

It is not a de Polignac number, because 12633771533 - 2³⁰ = 11560029709 is a prime.

It is a super-2 number, since 2×12633771533² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12633771433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5654108 + ... + 5656341.

It is an arithmetic number, because the mean of its divisors is an integer number (3161270775).

Almost surely, 2^12633771533 is an apocalyptic number.

It is an amenable number.

12633771533 is a deficient number, since it is larger than the sum of its proper divisors (11311567).

12633771533 is a wasteful number, since it uses less digits than its factorization.

12633771533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11311566.

The product of its digits is 238140, while the sum is 41.

The spelling of 12633771533 in words is "twelve billion, six hundred thirty-three million, seven hundred seventy-one thousand, five hundred thirty-three".