135237482172 has 144 divisors (see below), whose sum is σ = 383425025760. Its totient is φ = 41198976000.

The previous prime is 135237482141. The next prime is 135237482203. The reversal of 135237482172 is 271284732531.

135237482172 is a `hidden beast` number, since 1 + 35 + 2 + 374 + 82 + 172 = 666.

It is an interprime number because it is at equal distance from previous prime (135237482141) and next prime (135237482203).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1806772 + ... + 1880132.

It is an arithmetic number, because the mean of its divisors is an integer number (2662673790).

Almost surely, 2^135237482172 is an apocalyptic number.

135237482172 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 135237482172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191712512880).

135237482172 is an abundant number, since it is smaller than the sum of its proper divisors (248187543588).

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

135237482172 is a wasteful number, since it uses less digits than its factorization.

135237482172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73501 (or 73480 counting only the distinct ones).

The product of its digits is 564480, while the sum is 45.

The spelling of 135237482172 in words is "one hundred thirty-five billion, two hundred thirty-seven million, four hundred eighty-two thousand, one hundred seventy-two".