36643612433 has 4 divisors (see below), whose sum is σ = 36645172260. Its totient is φ = 36642052608.

The previous prime is 36643612427. The next prime is 36643612493. The reversal of 36643612433 is 33421634663.

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 16946051329 + 19697561104 = 130177^2 + 140348^2 .

It is a cyclic number.

It is not a de Polignac number, because 36643612433 - 2⁴ = 36643612417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (36643612493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 744128 + ... + 791841.

It is an arithmetic number, because the mean of its divisors is an integer number (9161293065).

Almost surely, 2^36643612433 is an apocalyptic number.

It is an amenable number.

36643612433 is a deficient number, since it is larger than the sum of its proper divisors (1559827).

36643612433 is a wasteful number, since it uses less digits than its factorization.

36643612433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1559826.

The product of its digits is 559872, while the sum is 41.

The spelling of 36643612433 in words is "thirty-six billion, six hundred forty-three million, six hundred twelve thousand, four hundred thirty-three".