36868533521 has 4 divisors (see below), whose sum is σ = 36883034112. Its totient is φ = 36854032932.

The previous prime is 36868533433. The next prime is 36868533557. The reversal of 36868533521 is 12533586863.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 36868533521 - 2¹⁰ = 36868532497 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 36868533521.

It is not an unprimeable number, because it can be changed into a prime (36868533571) 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, 7246481 + ... + 7251566.

It is an arithmetic number, because the mean of its divisors is an integer number (9220758528).

Almost surely, 2^36868533521 is an apocalyptic number.

It is an amenable number.

36868533521 is a deficient number, since it is larger than the sum of its proper divisors (14500591).

36868533521 is a wasteful number, since it uses less digits than its factorization.

36868533521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14500590.

The product of its digits is 3110400, while the sum is 50.

The spelling of 36868533521 in words is "thirty-six billion, eight hundred sixty-eight million, five hundred thirty-three thousand, five hundred twenty-one".