36521540513 has 4 divisors (see below), whose sum is σ = 36526048020. Its totient is φ = 36517033008.

The previous prime is 36521540507. The next prime is 36521540551. The reversal of 36521540513 is 31504512563.

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 16432163344 + 20089377169 = 128188^2 + 141737^2 .

It is a cyclic number.

It is not a de Polignac number, because 36521540513 - 2¹⁰ = 36521539489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36521540413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2241578 + ... + 2257811.

It is an arithmetic number, because the mean of its divisors is an integer number (9131512005).

Almost surely, 2^36521540513 is an apocalyptic number.

It is an amenable number.

36521540513 is a deficient number, since it is larger than the sum of its proper divisors (4507507).

36521540513 is an equidigital number, since it uses as much as digits as its factorization.

36521540513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4507506.

The product of its (nonzero) digits is 54000, while the sum is 35.

The spelling of 36521540513 in words is "thirty-six billion, five hundred twenty-one million, five hundred forty thousand, five hundred thirteen".