36699836525521 has 27 divisors (see below), whose sum is σ = 41545061831217. Its totient is φ = 32402269716960.

The previous prime is 36699836525491. The next prime is 36699836525537. The reversal of 36699836525521 is 12552563899663.

The square root of 36699836525521 is 6058039.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 28136394140625 + 8563442384896 = 5304375^2 + 2926336^2 .

It is not a de Polignac number, because 36699836525521 - 2¹⁷ = 36699836394449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36699836523521) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1811343531 + ... + 1811363791.

Almost surely, 2^{36699836525521} is an apocalyptic number.

36699836525521 is the 6058039-th square number.

36699836525521 is the 3029020-th centered octagonal number.

It is an amenable number.

36699836525521 is a deficient number, since it is larger than the sum of its proper divisors (4845225305696).

36699836525521 is an frugal number, since it uses more digits than its factorization.

36699836525521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40594 (or 20297 counting only the distinct ones).

The product of its digits is 629856000, while the sum is 70.

The spelling of 36699836525521 in words is "thirty-six trillion, six hundred ninety-nine billion, eight hundred thirty-six million, five hundred twenty-five thousand, five hundred twenty-one".