255555124240000 has 160 divisors (see below), whose sum is σ = 685126090049940. Its totient is φ = 94358814720000.

The previous prime is 255555124239983. The next prime is 255555124240007. The reversal of 255555124240000 is 42421555552.

It can be written as a sum of positive squares in 10 ways, for example, as 42581262786624 + 212973861453376 = 6525432^2 + 14593624^2 .

It is a tau number, because it is divible by the number of its divisors (160).

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

It is not an unprimeable number, because it can be changed into a prime (255555124240007) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 121823041 + ... + 123903040.

Almost surely, 2^{255555124240000} is an apocalyptic number.

255555124240000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255555124240000 is an abundant number, since it is smaller than the sum of its proper divisors (429570965809940).

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

255555124240000 is an equidigital number, since it uses as much as digits as its factorization.

255555124240000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245726128 (or 245726101 counting only the distinct ones).

The product of its (nonzero) digits is 400000, while the sum is 40.

Adding to 255555124240000 its reverse (42421555552), we get a palindrome (255597545795552).

The spelling of 255555124240000 in words is "two hundred fifty-five trillion, five hundred fifty-five billion, one hundred twenty-four million, two hundred forty thousand".