36601381921 has 8 divisors (see below), whose sum is σ = 39421244520. Its totient is φ = 33782143872.

The previous prime is 36601381877. The next prime is 36601381979. The reversal of 36601381921 is 12918310663.

It can be written as a sum of positive squares in 4 ways, for example, as 5233075600 + 31368306321 = 72340^2 + 177111^2 .

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 36601381921 - 2⁹ = 36601381409 is a prime.

It is a super-2 number, since 2×36601381921² (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 (36601384921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30676 + ... + 272293.

It is an arithmetic number, because the mean of its divisors is an integer number (4927655565).

Almost surely, 2^36601381921 is an apocalyptic number.

It is an amenable number.

36601381921 is a deficient number, since it is larger than the sum of its proper divisors (2819862599).

36601381921 is a wasteful number, since it uses less digits than its factorization.

36601381921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312275.

The product of its (nonzero) digits is 46656, while the sum is 40.

The spelling of 36601381921 in words is "thirty-six billion, six hundred one million, three hundred eighty-one thousand, nine hundred twenty-one".