255545204040 has 384 divisors, whose sum is σ = 976400006400. Its totient is φ = 56757749760.

The previous prime is 255545204029. The next prime is 255545204053. The reversal of 255545204040 is 40402545552.

255545204040 is a `hidden beast` number, since 2 + 5 + 5 + 54 + 520 + 40 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 255545203986 and 255545204004.

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, 12748746 + ... + 12768774.

It is an arithmetic number, because the mean of its divisors is an integer number (2542708350).

Almost surely, 2^255545204040 is an apocalyptic number.

255545204040 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 255545204040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (488200003200).

255545204040 is an abundant number, since it is smaller than the sum of its proper divisors (720854802360).

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

255545204040 is a wasteful number, since it uses less digits than its factorization.

255545204040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20197 (or 20190 counting only the distinct ones).

The product of its (nonzero) digits is 160000, while the sum is 36.

Adding to 255545204040 its reverse (40402545552), we get a palindrome (295947749592).

The spelling of 255545204040 in words is "two hundred fifty-five billion, five hundred forty-five million, two hundred four thousand, forty".