135120019356 has 72 divisors (see below), whose sum is σ = 391434301440. Its totient is φ = 38498157216.

The previous prime is 135120019351. The next prime is 135120019367. The reversal of 135120019356 is 653910021531.

It is a happy number.

135120019356 is a `hidden beast` number, since 1 + 3 + 512 + 0 + 0 + 1 + 93 + 56 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 135120019356.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135120019351) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 656316 + ... + 837251.

It is an arithmetic number, because the mean of its divisors is an integer number (5436587520).

Almost surely, 2^135120019356 is an apocalyptic number.

It is an amenable number.

135120019356 is an abundant number, since it is smaller than the sum of its proper divisors (256314282084).

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

135120019356 is a wasteful number, since it uses less digits than its factorization.

135120019356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1493943 (or 1493938 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 36.

The spelling of 135120019356 in words is "one hundred thirty-five billion, one hundred twenty million, nineteen thousand, three hundred fifty-six".