255503025553 has 4 divisors (see below), whose sum is σ = 264313474740. Its totient is φ = 246692576368.

The previous prime is 255503025541. The next prime is 255503025571. The reversal of 255503025553 is 355520305552.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 134114891089 + 121388134464 = 366217^2 + 348408^2 .

It is a cyclic number.

It is not a de Polignac number, because 255503025553 - 2¹³ = 255503017361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255503025523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4405224550 + ... + 4405224607.

It is an arithmetic number, because the mean of its divisors is an integer number (66078368685).

Almost surely, 2^255503025553 is an apocalyptic number.

It is an amenable number.

255503025553 is a deficient number, since it is larger than the sum of its proper divisors (8810449187).

255503025553 is an equidigital number, since it uses as much as digits as its factorization.

255503025553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8810449186.

The product of its (nonzero) digits is 562500, while the sum is 40.

The spelling of 255503025553 in words is "two hundred fifty-five billion, five hundred three million, twenty-five thousand, five hundred fifty-three".