36644969543889 has 8 divisors (see below), whose sum is σ = 55839953590720. Its totient is φ = 20939982596496.

The previous prime is 36644969543873. The next prime is 36644969543927. The reversal of 36644969543889 is 98834596944663.

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

It is not a de Polignac number, because 36644969543889 - 2⁴ = 36644969543873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36644969543989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 872499274834 + ... + 872499274875.

It is an arithmetic number, because the mean of its divisors is an integer number (6979994198840).

Almost surely, 2^{36644969543889} is an apocalyptic number.

It is an amenable number.

36644969543889 is a deficient number, since it is larger than the sum of its proper divisors (19194984046831).

36644969543889 is a wasteful number, since it uses less digits than its factorization.

36644969543889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1744998549719.

The product of its digits is 29023764480, while the sum is 84.

The spelling of 36644969543889 in words is "thirty-six trillion, six hundred forty-four billion, nine hundred sixty-nine million, five hundred forty-three thousand, eight hundred eighty-nine".