255655274521 has 4 divisors (see below), whose sum is σ = 257223711952. Its totient is φ = 254086837092.

The previous prime is 255655274513. The next prime is 255655274597. The reversal of 255655274521 is 125472556552.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 255655274521 - 2³ = 255655274513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255655274921) 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, 784218471 + ... + 784218796.

It is an arithmetic number, because the mean of its divisors is an integer number (64305927988).

Almost surely, 2^255655274521 is an apocalyptic number.

It is an amenable number.

255655274521 is a deficient number, since it is larger than the sum of its proper divisors (1568437431).

255655274521 is a wasteful number, since it uses less digits than its factorization.

255655274521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1568437430.

The product of its digits is 4200000, while the sum is 49.

The spelling of 255655274521 in words is "two hundred fifty-five billion, six hundred fifty-five million, two hundred seventy-four thousand, five hundred twenty-one".