255124124420440 has 128 divisors (see below), whose sum is σ = 628026167232000. Its totient is φ = 92503960243200.

The previous prime is 255124124420413. The next prime is 255124124420453. The reversal of 255124124420440 is 44024421421552.

It is a super-3 number, since 3×255124124420440³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 255124124420393 and 255124124420402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1543028575 + ... + 1543193905.

It is an arithmetic number, because the mean of its divisors is an integer number (4906454431500).

Almost surely, 2^{255124124420440} is an apocalyptic number.

255124124420440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 255124124420440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (314013083616000).

255124124420440 is an abundant number, since it is smaller than the sum of its proper divisors (372902042811560).

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

255124124420440 is a wasteful number, since it uses less digits than its factorization.

255124124420440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175481 (or 175477 counting only the distinct ones).

The product of its (nonzero) digits is 409600, while the sum is 40.

Adding to 255124124420440 its reverse (44024421421552), we get a palindrome (299148545841992).

The spelling of 255124124420440 in words is "two hundred fifty-five trillion, one hundred twenty-four billion, one hundred twenty-four million, four hundred twenty thousand, four hundred forty".