36661597409 has 8 divisors (see below), whose sum is σ = 37391378112. Its totient is φ = 35933226160.

The previous prime is 36661597381. The next prime is 36661597411. The reversal of 36661597409 is 90479516663.

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 36661597409 - 2¹² = 36661593313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36661597909) 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, 299747 + ... + 403944.

It is an arithmetic number, because the mean of its divisors is an integer number (4673922264).

Almost surely, 2^36661597409 is an apocalyptic number.

It is an amenable number.

36661597409 is a deficient number, since it is larger than the sum of its proper divisors (729780703).

36661597409 is an equidigital number, since it uses as much as digits as its factorization.

36661597409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704727.

The product of its (nonzero) digits is 7348320, while the sum is 56.

The spelling of 36661597409 in words is "thirty-six billion, six hundred sixty-one million, five hundred ninety-seven thousand, four hundred nine".