36634735721 has 8 divisors (see below), whose sum is σ = 37938049920. Its totient is φ = 35334091408.

The previous prime is 36634735717. The next prime is 36634735733. The reversal of 36634735721 is 12753743663.

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

It is a cyclic number.

It is not a de Polignac number, because 36634735721 - 2² = 36634735717 is a prime.

It is a super-2 number, since 2×36634735721² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36634735751) 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, 639521 + ... + 694446.

It is an arithmetic number, because the mean of its divisors is an integer number (4742256240).

Almost surely, 2^36634735721 is an apocalyptic number.

It is an amenable number.

36634735721 is a deficient number, since it is larger than the sum of its proper divisors (1303314199).

36634735721 is a wasteful number, since it uses less digits than its factorization.

36634735721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1334943.

The product of its digits is 1905120, while the sum is 47.

The spelling of 36634735721 in words is "thirty-six billion, six hundred thirty-four million, seven hundred thirty-five thousand, seven hundred twenty-one".