36209721601 has 4 divisors (see below), whose sum is σ = 36214989232. Its totient is φ = 36204453972.

The previous prime is 36209721593. The next prime is 36209721617. The reversal of 36209721601 is 10612790263.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 36209721601 - 2³ = 36209721593 is a prime.

It is a super-2 number, since 2×36209721601² (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 (36209721641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2623491 + ... + 2637256.

It is an arithmetic number, because the mean of its divisors is an integer number (9053747308).

Almost surely, 2^36209721601 is an apocalyptic number.

It is an amenable number.

36209721601 is a deficient number, since it is larger than the sum of its proper divisors (5267631).

36209721601 is an equidigital number, since it uses as much as digits as its factorization.

36209721601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5267630.

The product of its (nonzero) digits is 27216, while the sum is 37.

The spelling of 36209721601 in words is "thirty-six billion, two hundred nine million, seven hundred twenty-one thousand, six hundred one".