9001995636 has 72 divisors (see below), whose sum is σ = 22883798784. Its totient is φ = 2750993280.

The previous prime is 9001995593. The next prime is 9001995637. The reversal of 9001995636 is 6365991009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9001995637) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 100776 + ... + 167808.

Almost surely, 2^9001995636 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9001995636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11441899392).

9001995636 is an abundant number, since it is smaller than the sum of its proper divisors (13881803148).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9001995636 is a wasteful number, since it uses less digits than its factorization.

9001995636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67109 (or 67088 counting only the distinct ones).

The product of its (nonzero) digits is 393660, while the sum is 48.

The square root of 9001995636 is about 94878.8471472962. The cubic root of 9001995636 is about 2080.2375557697.

The spelling of 9001995636 in words is "nine billion, one million, nine hundred ninety-five thousand, six hundred thirty-six".