36521206181 has 4 divisors (see below), whose sum is σ = 36521590572. Its totient is φ = 36520821792.

The previous prime is 36521206147. The next prime is 36521206219. The reversal of 36521206181 is 18160212563.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 32750140900 + 3771065281 = 180970^2 + 61409^2 .

It is a cyclic number.

It is not a de Polignac number, because 36521206181 - 2³⁰ = 35447464357 is a prime.

It is a super-2 number, since 2×36521206181² (a number of 22 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 (36521206481) 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, 65441 + ... + 278073.

It is an arithmetic number, because the mean of its divisors is an integer number (9130397643).

Almost surely, 2^36521206181 is an apocalyptic number.

It is an amenable number.

36521206181 is a deficient number, since it is larger than the sum of its proper divisors (384391).

36521206181 is a wasteful number, since it uses less digits than its factorization.

36521206181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384390.

The product of its (nonzero) digits is 17280, while the sum is 35.

The spelling of 36521206181 in words is "thirty-six billion, five hundred twenty-one million, two hundred six thousand, one hundred eighty-one".