505561256412 has 72 divisors (see below), whose sum is σ = 1254092823984. Its totient is φ = 158483755008.

The previous prime is 505561256377. The next prime is 505561256507. The reversal of 505561256412 is 214652165505.

It is a super-2 number, since 2×505561256412² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4441798 + ... + 4554194.

Almost surely, 2^505561256412 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 505561256412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (627046411992).

505561256412 is an abundant number, since it is smaller than the sum of its proper divisors (748531567572).

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

505561256412 is a wasteful number, since it uses less digits than its factorization.

505561256412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113735 (or 113716 counting only the distinct ones).

The product of its (nonzero) digits is 360000, while the sum is 42.

The spelling of 505561256412 in words is "five hundred five billion, five hundred sixty-one million, two hundred fifty-six thousand, four hundred twelve".