11555623452 has 96 divisors (see below), whose sum is σ = 30166214400. Its totient is φ = 3421412352.

The previous prime is 11555623427. The next prime is 11555623501. The reversal of 11555623452 is 25432655511.

It is a self number, because there is not a number n which added to its sum of digits gives 11555623452.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1037103 + ... + 1048185.

It is an arithmetic number, because the mean of its divisors is an integer number (314231400).

Almost surely, 2^11555623452 is an apocalyptic number.

11555623452 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 11555623452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15083107200).

11555623452 is an abundant number, since it is smaller than the sum of its proper divisors (18610590948).

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

11555623452 is a wasteful number, since it uses less digits than its factorization.

11555623452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11395 (or 11393 counting only the distinct ones).

The product of its digits is 180000, while the sum is 39.

The spelling of 11555623452 in words is "eleven billion, five hundred fifty-five million, six hundred twenty-three thousand, four hundred fifty-two".