135420361638 has 16 divisors (see below), whose sum is σ = 278160743280. Its totient is φ = 43920117216.

The previous prime is 135420361621. The next prime is 135420361667. The reversal of 135420361638 is 836163024531.

It is a self number, because there is not a number n which added to its sum of digits gives 135420361638.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 305000593 + ... + 305001036.

It is an arithmetic number, because the mean of its divisors is an integer number (17385046455).

Almost surely, 2^135420361638 is an apocalyptic number.

135420361638 is an abundant number, since it is smaller than the sum of its proper divisors (142740381642).

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

135420361638 is a wasteful number, since it uses less digits than its factorization.

135420361638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610001671.

The product of its (nonzero) digits is 311040, while the sum is 42.

The spelling of 135420361638 in words is "one hundred thirty-five billion, four hundred twenty million, three hundred sixty-one thousand, six hundred thirty-eight".