11388791532 has 48 divisors (see below), whose sum is σ = 27445017600. Its totient is φ = 3671935680.

The previous prime is 11388791507. The next prime is 11388791537. The reversal of 11388791532 is 23519788311.

It is not an unprimeable number, because it can be changed into a prime (11388791537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 852319 + ... + 865577.

It is an arithmetic number, because the mean of its divisors is an integer number (571771200).

Almost surely, 2^11388791532 is an apocalyptic number.

11388791532 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11388791532 is an abundant number, since it is smaller than the sum of its proper divisors (16056226068).

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

11388791532 is a wasteful number, since it uses less digits than its factorization.

11388791532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15606 (or 15604 counting only the distinct ones).

The product of its digits is 362880, while the sum is 48.

It can be divided in two parts, 1138879 and 1532, that added together give a palindrome (1140411).

The spelling of 11388791532 in words is "eleven billion, three hundred eighty-eight million, seven hundred ninety-one thousand, five hundred thirty-two".