36641558521 has 8 divisors (see below), whose sum is σ = 36738150344. Its totient is φ = 36545022720.

The previous prime is 36641558489. The next prime is 36641558531. The reversal of 36641558521 is 12585514663.

It can be written as a sum of positive squares in 4 ways, for example, as 19444908025 + 17196650496 = 139445^2 + 131136^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 36641558521 - 2⁵ = 36641558489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36641558531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1510831 + ... + 1534891.

It is an arithmetic number, because the mean of its divisors is an integer number (4592268793).

Almost surely, 2^36641558521 is an apocalyptic number.

It is an amenable number.

36641558521 is a deficient number, since it is larger than the sum of its proper divisors (96591823).

36641558521 is a wasteful number, since it uses less digits than its factorization.

36641558521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28011.

The product of its digits is 864000, while the sum is 46.

The spelling of 36641558521 in words is "thirty-six billion, six hundred forty-one million, five hundred fifty-eight thousand, five hundred twenty-one".