255395326292640 has 288 divisors, whose sum is σ = 923250267313920. Its totient is φ = 64109962156032.

The previous prime is 255395326292543. The next prime is 255395326292669. The reversal of 255395326292640 is 46292623593552.

255395326292640 is a `hidden beast` number, since 2 + 5 + 5 + 3 + 9 + 532 + 6 + 2 + 92 + 6 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

It is a super-3 number, since 3×255395326292640³ (a number of 44 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25432584 + ... + 34023623.

It is an arithmetic number, because the mean of its divisors is an integer number (3205730094840).

Almost surely, 2^{255395326292640} is an apocalyptic number.

255395326292640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255395326292640 is an abundant number, since it is smaller than the sum of its proper divisors (667854941021280).

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

255395326292640 is a wasteful number, since it uses less digits than its factorization.

255395326292640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59456404 (or 59456393 counting only the distinct ones).

The product of its (nonzero) digits is 209952000, while the sum is 63.

The spelling of 255395326292640 in words is "two hundred fifty-five trillion, three hundred ninety-five billion, three hundred twenty-six million, two hundred ninety-two thousand, six hundred forty".