36561655673021 has 16 divisors (see below), whose sum is σ = 37046632598976. Its totient is φ = 36079823520000.

The previous prime is 36561655673003. The next prime is 36561655673029. The reversal of 36561655673021 is 12037655616563.

36561655673021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-36561655673021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36561655673029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 471596741 + ... + 471674261.

It is an arithmetic number, because the mean of its divisors is an integer number (2315414537436).

Almost surely, 2^{36561655673021} is an apocalyptic number.

It is an amenable number.

36561655673021 is a deficient number, since it is larger than the sum of its proper divisors (484976925955).

36561655673021 is a wasteful number, since it uses less digits than its factorization.

36561655673021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97724.

The product of its (nonzero) digits is 20412000, while the sum is 56.

The spelling of 36561655673021 in words is "thirty-six trillion, five hundred sixty-one billion, six hundred fifty-five million, six hundred seventy-three thousand, twenty-one".