255605235489 has 24 divisors (see below), whose sum is σ = 388780211040. Its totient is φ = 161376452928.

The previous prime is 255605235481. The next prime is 255605235499. The reversal of 255605235489 is 984532506552.

255605235489 is a `hidden beast` number, since 2 + 5 + 5 + 60 + 523 + 54 + 8 + 9 = 666.

It is not a de Polignac number, because 255605235489 - 2³ = 255605235481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (255605235481) 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, 205734 + ... + 744000.

It is an arithmetic number, because the mean of its divisors is an integer number (16199175460).

Almost surely, 2^255605235489 is an apocalyptic number.

It is an amenable number.

255605235489 is a deficient number, since it is larger than the sum of its proper divisors (133174975551).

255605235489 is a wasteful number, since it uses less digits than its factorization.

255605235489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541069 (or 541066 counting only the distinct ones).

The product of its (nonzero) digits is 12960000, while the sum is 54.

The spelling of 255605235489 in words is "two hundred fifty-five billion, six hundred five million, two hundred thirty-five thousand, four hundred eighty-nine".