255556622020040 has 256 divisors, whose sum is σ = 643020156979200. Its totient is φ = 90605068646400.

The previous prime is 255556622020031. The next prime is 255556622020067. The reversal of 255556622020040 is 40020226655552.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 255556622019973 and 255556622020000.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 26567894351 + ... + 26567903969.

It is an arithmetic number, because the mean of its divisors is an integer number (2511797488200).

Almost surely, 2^{255556622020040} is an apocalyptic number.

255556622020040 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 255556622020040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (321510078489600).

255556622020040 is an abundant number, since it is smaller than the sum of its proper divisors (387463534959160).

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

255556622020040 is a wasteful number, since it uses less digits than its factorization.

255556622020040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12068 (or 12064 counting only the distinct ones).

The product of its (nonzero) digits is 1440000, while the sum is 44.

Adding to 255556622020040 its reverse (40020226655552), we get a palindrome (295576848675592).

The spelling of 255556622020040 in words is "two hundred fifty-five trillion, five hundred fifty-six billion, six hundred twenty-two million, twenty thousand, forty".