1636216045 has 8 divisors (see below), whose sum is σ = 1992765024. Its totient is φ = 1289435664.

The previous prime is 1636216031. The next prime is 1636216061. The reversal of 1636216045 is 5406126361.

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 1636216045 - 2⁵ = 1636216013 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1636216045.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2441779 + ... + 2442448.

It is an arithmetic number, because the mean of its divisors is an integer number (249095628).

Almost surely, 2^1636216045 is an apocalyptic number.

It is an amenable number.

1636216045 is a deficient number, since it is larger than the sum of its proper divisors (356548979).

1636216045 is an equidigital number, since it uses as much as digits as its factorization.

1636216045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4884299.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 1636216045 is about 40450.1674285781. The cubic root of 1636216045 is about 1178.3660342129.

The spelling of 1636216045 in words is "one billion, six hundred thirty-six million, two hundred sixteen thousand, forty-five".