36565621641 has 16 divisors (see below), whose sum is σ = 55089451200. Its totient is φ = 23963909184.

The previous prime is 36565621627. The next prime is 36565621661. The reversal of 36565621641 is 14612656563.

36565621641 is a `hidden beast` number, since 3 + 6 + 565 + 6 + 21 + 64 + 1 = 666.

It is not a de Polignac number, because 36565621641 - 2¹⁴ = 36565605257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (36565621661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11475376 + ... + 11478561.

It is an arithmetic number, because the mean of its divisors is an integer number (3443090700).

Almost surely, 2^36565621641 is an apocalyptic number.

It is an amenable number.

36565621641 is a deficient number, since it is larger than the sum of its proper divisors (18523829559).

36565621641 is a wasteful number, since it uses less digits than its factorization.

36565621641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22954005 (or 22953999 counting only the distinct ones).

The product of its digits is 777600, while the sum is 45.

The spelling of 36565621641 in words is "thirty-six billion, five hundred sixty-five million, six hundred twenty-one thousand, six hundred forty-one".