1636797085 has 32 divisors (see below), whose sum is σ = 2577715200. Its totient is φ = 966634560.

The previous prime is 1636797073. The next prime is 1636797143. The reversal of 1636797085 is 5807976361.

It is not a de Polignac number, because 1636797085 - 2⁵ = 1636797053 is a prime.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 104565 + ... + 119194.

It is an arithmetic number, because the mean of its divisors is an integer number (80553600).

Almost surely, 2^1636797085 is an apocalyptic number.

It is an amenable number.

1636797085 is a deficient number, since it is larger than the sum of its proper divisors (940918115).

1636797085 is a wasteful number, since it uses less digits than its factorization.

1636797085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223801.

The product of its (nonzero) digits is 1905120, while the sum is 52.

The square root of 1636797085 is about 40457.3489615916. The cubic root of 1636797085 is about 1178.5055016898.

The spelling of 1636797085 in words is "one billion, six hundred thirty-six million, seven hundred ninety-seven thousand, eighty-five".