505455353350656 has 160 divisors (see below), whose sum is σ = 1379685926824128. Its totient is φ = 164342569205760.

The previous prime is 505455353350621. The next prime is 505455353350709. The reversal of 505455353350656 is 656053353554505.

It is a super-2 number, since 2×505455353350656² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 505455353350656.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 312372675 + ... + 313986621.

Almost surely, 2^{505455353350656} 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 505455353350656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (689842963412064).

505455353350656 is an abundant number, since it is smaller than the sum of its proper divisors (874230573473472).

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

505455353350656 is a wasteful number, since it uses less digits than its factorization.

505455353350656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1618982 (or 1618966 counting only the distinct ones).

The product of its (nonzero) digits is 303750000, while the sum is 60.

The spelling of 505455353350656 in words is "five hundred five trillion, four hundred fifty-five billion, three hundred fifty-three million, three hundred fifty thousand, six hundred fifty-six".