36219685987561 has 4 divisors (see below), whose sum is σ = 36220014528724. Its totient is φ = 36219357446400.

The previous prime is 36219685987559. The next prime is 36219685987627. The reversal of 36219685987561 is 16578958691263.

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 6443499944025 + 29776186043536 = 2538405^2 + 5456756^2 .

It is a cyclic number.

It is not a de Polignac number, because 36219685987561 - 2¹ = 36219685987559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36219685957561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164105160 + ... + 164325721.

It is an arithmetic number, because the mean of its divisors is an integer number (9055003632181).

Almost surely, 2^{36219685987561} is an apocalyptic number.

It is an amenable number.

36219685987561 is a deficient number, since it is larger than the sum of its proper divisors (328541163).

36219685987561 is a wasteful number, since it uses less digits than its factorization.

36219685987561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328541162.

The product of its digits is 1175731200, while the sum is 76.

The spelling of 36219685987561 in words is "thirty-six trillion, two hundred nineteen billion, six hundred eighty-five million, nine hundred eighty-seven thousand, five hundred sixty-one".