11391638352 has 60 divisors (see below), whose sum is σ = 30763593504. Its totient is φ = 3632108480.

The previous prime is 11391638333. The next prime is 11391638353. The reversal of 11391638352 is 25383619311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11391638353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 198924 + ... + 249707.

Almost surely, 2^11391638352 is an apocalyptic number.

11391638352 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11391638352 is an abundant number, since it is smaller than the sum of its proper divisors (19371955152).

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

11391638352 is a wasteful number, since it uses less digits than its factorization.

11391638352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448688 (or 448659 counting only the distinct ones).

The product of its digits is 116640, while the sum is 42.

The spelling of 11391638352 in words is "eleven billion, three hundred ninety-one million, six hundred thirty-eight thousand, three hundred fifty-two".