255775563630 has 192 divisors, whose sum is σ = 741952560960. Its totient is φ = 60753825792.

The previous prime is 255775563587. The next prime is 255775563653. The reversal of 255775563630 is 36365577552.

255775563630 is a `hidden beast` number, since 2 + 5 + 5 + 7 + 75 + 563 + 6 + 3 + 0 = 666.

It is a super-2 number, since 2×255775563630² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 32467252 + ... + 32475128.

It is an arithmetic number, because the mean of its divisors is an integer number (3864336255).

Almost surely, 2^255775563630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 255775563630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (370976280480).

255775563630 is an abundant number, since it is smaller than the sum of its proper divisors (486176997330).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

255775563630 is a wasteful number, since it uses less digits than its factorization.

255775563630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9043 (or 9040 counting only the distinct ones).

The product of its (nonzero) digits is 19845000, while the sum is 54.

The spelling of 255775563630 in words is "two hundred fifty-five billion, seven hundred seventy-five million, five hundred sixty-three thousand, six hundred thirty".