36647521459681 has 16 divisors (see below), whose sum is σ = 41717590432128. Its totient is φ = 31867216128000.

The previous prime is 36647521459657. The next prime is 36647521459709. The reversal of 36647521459681 is 18695412574663.

It is not a de Polignac number, because 36647521459681 - 2⁷ = 36647521459553 is a prime.

It is a super-2 number, since 2×36647521459681² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36647521459481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54994081 + ... + 55656481.

It is an arithmetic number, because the mean of its divisors is an integer number (2607349402008).

Almost surely, 2^{36647521459681} is an apocalyptic number.

It is an amenable number.

36647521459681 is a deficient number, since it is larger than the sum of its proper divisors (5070068972447).

36647521459681 is a wasteful number, since it uses less digits than its factorization.

36647521459681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 881112.

The product of its digits is 261273600, while the sum is 67.

The spelling of 36647521459681 in words is "thirty-six trillion, six hundred forty-seven billion, five hundred twenty-one million, four hundred fifty-nine thousand, six hundred eighty-one".