36579643021 has 4 divisors (see below), whose sum is σ = 36711699772. Its totient is φ = 36447586272.

The previous prime is 36579642959. The next prime is 36579643027. The reversal of 36579643021 is 12034697563.

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 4578010921 + 32001632100 = 67661^2 + 178890^2 .

It is a cyclic number.

It is not a de Polignac number, because 36579643021 - 2¹¹ = 36579640973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36579643027) 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, 66027960 + ... + 66028513.

It is an arithmetic number, because the mean of its divisors is an integer number (9177924943).

Almost surely, 2^36579643021 is an apocalyptic number.

It is an amenable number.

36579643021 is a deficient number, since it is larger than the sum of its proper divisors (132056751).

36579643021 is a wasteful number, since it uses less digits than its factorization.

36579643021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132056750.

The product of its (nonzero) digits is 816480, while the sum is 46.

The spelling of 36579643021 in words is "thirty-six billion, five hundred seventy-nine million, six hundred forty-three thousand, twenty-one".