11631385633 has 24 divisors (see below), whose sum is σ = 13813063080. Its totient is φ = 9762923520.

The previous prime is 11631385621. The next prime is 11631385687. The reversal of 11631385633 is 33658313611.

It can be written as a sum of positive squares in 4 ways, for example, as 256736529 + 11374649104 = 16023^2 + 106652^2 .

It is not a de Polignac number, because 11631385633 - 2³³ = 3041451041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11631385033) 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, 675985 + ... + 692977.

It is an arithmetic number, because the mean of its divisors is an integer number (575544295).

Almost surely, 2^11631385633 is an apocalyptic number.

It is an amenable number.

11631385633 is a deficient number, since it is larger than the sum of its proper divisors (2181677447).

11631385633 is a wasteful number, since it uses less digits than its factorization.

11631385633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17297 (or 17290 counting only the distinct ones).

The product of its digits is 116640, while the sum is 40.

The spelling of 11631385633 in words is "eleven billion, six hundred thirty-one million, three hundred eighty-five thousand, six hundred thirty-three".