36650019221 has 4 divisors (see below), whose sum is σ = 37429806912. Its totient is φ = 35870231532.

The previous prime is 36650019193. The next prime is 36650019227. The reversal of 36650019221 is 12291005663.

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 a de Polignac number, because none of the positive numbers 2^k-36650019221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36650019227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 389893775 + ... + 389893868.

It is an arithmetic number, because the mean of its divisors is an integer number (9357451728).

Almost surely, 2^36650019221 is an apocalyptic number.

It is an amenable number.

36650019221 is a deficient number, since it is larger than the sum of its proper divisors (779787691).

36650019221 is an equidigital number, since it uses as much as digits as its factorization.

36650019221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 779787690.

The product of its (nonzero) digits is 19440, while the sum is 35.

The spelling of 36650019221 in words is "thirty-six billion, six hundred fifty million, nineteen thousand, two hundred twenty-one".