135137281500 has 1008 divisors, whose sum is σ = 509314216320. Its totient is φ = 31114886400.

The previous prime is 135137281441. The next prime is 135137281553. The reversal of 135137281500 is 5182731531.

It is a happy number.

135137281500 is a `hidden beast` number, since 1 + 3 + 5 + 1 + 3 + 72 + 81 + 500 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 335 ways as a sum of consecutive naturals, for example, 1710598461 + ... + 1710598539.

It is an arithmetic number, because the mean of its divisors is an integer number (505272040).

Almost surely, 2^135137281500 is an apocalyptic number.

135137281500 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 135137281500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254657108160).

135137281500 is an abundant number, since it is smaller than the sum of its proper divisors (374176934820).

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

135137281500 is a wasteful number, since it uses less digits than its factorization.

135137281500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167 (or 121 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The spelling of 135137281500 in words is "one hundred thirty-five billion, one hundred thirty-seven million, two hundred eighty-one thousand, five hundred".