505555403256 has 48 divisors (see below), whose sum is σ = 1391658669960. Its totient is φ = 165755868480.

The previous prime is 505555403251. The next prime is 505555403263. The reversal of 505555403256 is 652304555505.

505555403256 is a `hidden beast` number, since 5 + 0 + 5 + 55 + 540 + 3 + 2 + 56 = 666.

It is a super-2 number, since 2×505555403256² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505555403251) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57549730 + ... + 57558513.

Almost surely, 2^505555403256 is an apocalyptic number.

It is an amenable number.

505555403256 is an abundant number, since it is smaller than the sum of its proper divisors (886103266704).

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

505555403256 is a wasteful number, since it uses less digits than its factorization.

505555403256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115108316 (or 115108309 counting only the distinct ones).

The product of its (nonzero) digits is 2250000, while the sum is 45.

The spelling of 505555403256 in words is "five hundred five billion, five hundred fifty-five million, four hundred three thousand, two hundred fifty-six".