11555134500 has 192 divisors, whose sum is σ = 41414091264. Its totient is φ = 2437977600.

The previous prime is 11555134489. The next prime is 11555134511. The reversal of 11555134500 is 543155511.

It is an interprime number because it is at equal distance from previous prime (11555134489) and next prime (11555134511).

It is a super-2 number, since 2×11555134500² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 94174 + ... + 178826.

It is an arithmetic number, because the mean of its divisors is an integer number (215698392).

Almost surely, 2^11555134500 is an apocalyptic number.

11555134500 is a gapful number since it is divisible by the number (10) 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 11555134500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20707045632).

11555134500 is an abundant number, since it is smaller than the sum of its proper divisors (29858956764).

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

11555134500 is a wasteful number, since it uses less digits than its factorization.

11555134500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84695 (or 84683 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 30.

It can be divided in two parts, 115551 and 34500, that added together give a palindrome (150051).

The spelling of 11555134500 in words is "eleven billion, five hundred fifty-five million, one hundred thirty-four thousand, five hundred".