36644861 has 8 divisors (see below), whose sum is σ = 40483200. Its totient is φ = 32891040.

The previous prime is 36644851. The next prime is 36644873. The reversal of 36644861 is 16844663.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-36644861 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 (36644801) 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 7 ways as a sum of consecutive naturals, for example, 20216 + ... + 21953.

It is an arithmetic number, because the mean of its divisors is an integer number (5060400).

Almost surely, 2^36644861 is an apocalyptic number.

It is an amenable number.

36644861 is a deficient number, since it is larger than the sum of its proper divisors (3838339).

36644861 is a wasteful number, since it uses less digits than its factorization.

36644861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42259.

The product of its digits is 82944, while the sum is 38.

The square root of 36644861 is about 6053.4998967539. The cubic root of 36644861 is about 332.1526279647.

The spelling of 36644861 in words is "thirty-six million, six hundred forty-four thousand, eight hundred sixty-one".