135421423550 has 192 divisors, whose sum is σ = 299860807680. Its totient is φ = 44540928000.

The previous prime is 135421423537. The next prime is 135421423573. The reversal of 135421423550 is 55324124531.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 135421423550.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 377218271 + ... + 377218629.

It is an arithmetic number, because the mean of its divisors is an integer number (1561775040).

Almost surely, 2^135421423550 is an apocalyptic number.

135421423550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

135421423550 is an abundant number, since it is smaller than the sum of its proper divisors (164439384130).

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

135421423550 is a wasteful number, since it uses less digits than its factorization.

135421423550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787 (or 782 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 35.

The spelling of 135421423550 in words is "one hundred thirty-five billion, four hundred twenty-one million, four hundred twenty-three thousand, five hundred fifty".