255729490758 has 192 divisors, whose sum is σ = 690273792000. Its totient is φ = 66762807552.

The previous prime is 255729490733. The next prime is 255729490763. The reversal of 255729490758 is 857094927552.

255729490758 is a `hidden beast` number, since 2 + 5 + 5 + 72 + 9 + 490 + 75 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 255729490695 and 255729490704.

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, 115870891 + ... + 115873097.

It is an arithmetic number, because the mean of its divisors is an integer number (3595176000).

Almost surely, 2^255729490758 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 255729490758, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (345136896000).

255729490758 is an abundant number, since it is smaller than the sum of its proper divisors (434544301242).

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

255729490758 is a wasteful number, since it uses less digits than its factorization.

255729490758 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3939 (or 3936 counting only the distinct ones).

The product of its (nonzero) digits is 63504000, while the sum is 63.

The spelling of 255729490758 in words is "two hundred fifty-five billion, seven hundred twenty-nine million, four hundred ninety thousand, seven hundred fifty-eight".