255530025557 has 16 divisors (see below), whose sum is σ = 260654284800. Its totient is φ = 250451740800.

The previous prime is 255530025533. The next prime is 255530025577. The reversal of 255530025557 is 755520035552.

It is a cyclic number.

It is not a de Polignac number, because 255530025557 - 2⁶ = 255530025493 is a prime.

It is a super-2 number, since 2×255530025557² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255530025577) 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, 19958444 + ... + 19971242.

It is an arithmetic number, because the mean of its divisors is an integer number (16290892800).

Almost surely, 2^255530025557 is an apocalyptic number.

It is an amenable number.

255530025557 is a deficient number, since it is larger than the sum of its proper divisors (5124259243).

255530025557 is a wasteful number, since it uses less digits than its factorization.

255530025557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14564.

The product of its (nonzero) digits is 1312500, while the sum is 44.

The spelling of 255530025557 in words is "two hundred fifty-five billion, five hundred thirty million, twenty-five thousand, five hundred fifty-seven".