255577730421 has 16 divisors (see below), whose sum is σ = 375934224960. Its totient is φ = 153442538880.

The previous prime is 255577730413. The next prime is 255577730459. The reversal of 255577730421 is 124037775552.

It is not a de Polignac number, because 255577730421 - 2³ = 255577730413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255577730461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79916391 + ... + 79919588.

It is an arithmetic number, because the mean of its divisors is an integer number (23495889060).

Almost surely, 2^255577730421 is an apocalyptic number.

It is an amenable number.

255577730421 is a deficient number, since it is larger than the sum of its proper divisors (120356494539).

255577730421 is a wasteful number, since it uses less digits than its factorization.

255577730421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159836036.

The product of its (nonzero) digits is 2058000, while the sum is 48.

The spelling of 255577730421 in words is "two hundred fifty-five billion, five hundred seventy-seven million, seven hundred thirty thousand, four hundred twenty-one".