36123494521 has 4 divisors (see below), whose sum is σ = 36735757200. Its totient is φ = 35511231844.

The previous prime is 36123494503. The next prime is 36123494549. The reversal of 36123494521 is 12549432163.

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 36123494521 - 2²¹ = 36121397369 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36123494821) 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, 306131251 + ... + 306131368.

It is an arithmetic number, because the mean of its divisors is an integer number (9183939300).

Almost surely, 2^36123494521 is an apocalyptic number.

It is an amenable number.

36123494521 is a deficient number, since it is larger than the sum of its proper divisors (612262679).

36123494521 is an equidigital number, since it uses as much as digits as its factorization.

36123494521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612262678.

The product of its digits is 155520, while the sum is 40.

The spelling of 36123494521 in words is "thirty-six billion, one hundred twenty-three million, four hundred ninety-four thousand, five hundred twenty-one".