11505444372 has 54 divisors (see below), whose sum is σ = 29879405738. Its totient is φ = 3730225824.

The previous prime is 11505444343. The next prime is 11505444373. The reversal of 11505444372 is 27344450511.

11505444372 is a `hidden beast` number, since 1 + 1 + 5 + 0 + 544 + 43 + 72 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11194486416 + 310957956 = 105804^2 + 17634^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11505444373) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3913279 + ... + 3916217.

Almost surely, 2^11505444372 is an apocalyptic number.

11505444372 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11505444372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14939702869).

11505444372 is an abundant number, since it is smaller than the sum of its proper divisors (18373961366).

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

11505444372 is an equidigital number, since it uses as much as digits as its factorization.

11505444372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5925 (or 2981 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 36.

Adding to 11505444372 its reverse (27344450511), we get a palindrome (38849894883).

The spelling of 11505444372 in words is "eleven billion, five hundred five million, four hundred forty-four thousand, three hundred seventy-two".