135521440180 has 96 divisors (see below), whose sum is σ = 333393967872. Its totient is φ = 45302707200.

The previous prime is 135521440151. The next prime is 135521440181. The reversal of 135521440180 is 81044125531.

It is a super-2 number, since 2×135521440180² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135521440181) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10388622 + ... + 10401658.

It is an arithmetic number, because the mean of its divisors is an integer number (3472853832).

Almost surely, 2^135521440180 is an apocalyptic number.

135521440180 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 135521440180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (166696983936).

135521440180 is an abundant number, since it is smaller than the sum of its proper divisors (197872527692).

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

135521440180 is a wasteful number, since it uses less digits than its factorization.

135521440180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14905 (or 14903 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 34.

The spelling of 135521440180 in words is "one hundred thirty-five billion, five hundred twenty-one million, four hundred forty thousand, one hundred eighty".