135220526040 has 128 divisors (see below), whose sum is σ = 427568414400. Its totient is φ = 34158458880.

The previous prime is 135220525967. The next prime is 135220526053. The reversal of 135220526040 is 40625022531.

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

It is a junction number, because it is equal to n+sod(n) for n = 135220525989 and 135220526007.

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, 182131 + ... + 551010.

Almost surely, 2^135220526040 is an apocalyptic number.

135220526040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

135220526040 is an abundant number, since it is smaller than the sum of its proper divisors (292347888360).

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

135220526040 is a wasteful number, since it uses less digits than its factorization.

135220526040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733237 (or 733233 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 135220526040 its reverse (40625022531), we get a palindrome (175845548571).

The spelling of 135220526040 in words is "one hundred thirty-five billion, two hundred twenty million, five hundred twenty-six thousand, forty".