36521015561 has 4 divisors (see below), whose sum is σ = 38669310612. Its totient is φ = 34372720512.

The previous prime is 36521015519. The next prime is 36521015569. The reversal of 36521015561 is 16551012563.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12458801161 + 24062214400 = 111619^2 + 155120^2 .

It is not a de Polignac number, because 36521015561 - 2¹⁸ = 36520753417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36521015569) 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 3 ways as a sum of consecutive naturals, for example, 1074147500 + ... + 1074147533.

It is an arithmetic number, because the mean of its divisors is an integer number (9667327653).

Almost surely, 2^36521015561 is an apocalyptic number.

It is an amenable number.

36521015561 is a deficient number, since it is larger than the sum of its proper divisors (2148295051).

36521015561 is a wasteful number, since it uses less digits than its factorization.

36521015561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2148295050.

The product of its (nonzero) digits is 27000, while the sum is 35.

The spelling of 36521015561 in words is "thirty-six billion, five hundred twenty-one million, fifteen thousand, five hundred sixty-one".