36575516521 has 6 divisors (see below), whose sum is σ = 36655934910. Its totient is φ = 36495274176.

The previous prime is 36575516519. The next prime is 36575516569. The reversal of 36575516521 is 12561557563.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 22301240896 + 14274275625 = 149336^2 + 119475^2 .

It is not a de Polignac number, because 36575516521 - 2¹ = 36575516519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36575516581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 121285 + ... + 296413.

It is an arithmetic number, because the mean of its divisors is an integer number (6109322485).

Almost surely, 2^36575516521 is an apocalyptic number.

It is an amenable number.

36575516521 is a deficient number, since it is larger than the sum of its proper divisors (80418389).

36575516521 is an frugal number, since it uses more digits than its factorization.

36575516521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176043 (or 175586 counting only the distinct ones).

The product of its digits is 945000, while the sum is 46.

The spelling of 36575516521 in words is "thirty-six billion, five hundred seventy-five million, five hundred sixteen thousand, five hundred twenty-one".