135550405020 has 48 divisors (see below), whose sum is σ = 389799008928. Its totient is φ = 35169834240.

The previous prime is 135550405019. The next prime is 135550405049. The reversal of 135550405020 is 20504055531.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30527151 + ... + 30531590.

It is an arithmetic number, because the mean of its divisors is an integer number (8120812686).

Almost surely, 2^135550405020 is an apocalyptic number.

135550405020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

135550405020 is an abundant number, since it is smaller than the sum of its proper divisors (254248603908).

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

135550405020 is a wasteful number, since it uses less digits than its factorization.

135550405020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61058790 (or 61058788 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 30.

The spelling of 135550405020 in words is "one hundred thirty-five billion, five hundred fifty million, four hundred five thousand, twenty".