135405500656 has 80 divisors (see below), whose sum is σ = 276626009088. Its totient is φ = 64125734400.

The previous prime is 135405500639. The next prime is 135405500717. The reversal of 135405500656 is 656005504531.

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, 4728975 + ... + 4757521.

Almost surely, 2^135405500656 is an apocalyptic number.

135405500656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 135405500656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138313004544).

135405500656 is an abundant number, since it is smaller than the sum of its proper divisors (141220508432).

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

135405500656 is a wasteful number, since it uses less digits than its factorization.

135405500656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28790 (or 28784 counting only the distinct ones).

The product of its (nonzero) digits is 270000, while the sum is 40.

The spelling of 135405500656 in words is "one hundred thirty-five billion, four hundred five million, five hundred thousand, six hundred fifty-six".