52505966856 has 96 divisors (see below), whose sum is σ = 153194358240. Its totient is φ = 14952736512.

The previous prime is 52505966839. The next prime is 52505966893. The reversal of 52505966856 is 65866950525.

It is a junction number, because it is equal to n+sod(n) for n = 52505966796 and 52505966805.

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, 288316 + ... + 433748.

It is an arithmetic number, because the mean of its divisors is an integer number (1595774565).

Almost surely, 2^52505966856 is an apocalyptic number.

52505966856 is a gapful number since it is divisible by the number (56) 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 52505966856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76597179120).

52505966856 is an abundant number, since it is smaller than the sum of its proper divisors (100688391384).

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

52505966856 is a wasteful number, since it uses less digits than its factorization.

52505966856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145763 (or 145752 counting only the distinct ones).

The product of its (nonzero) digits is 19440000, while the sum is 57.

The spelling of 52505966856 in words is "fifty-two billion, five hundred five million, nine hundred sixty-six thousand, eight hundred fifty-six".