53726566656 has 432 divisors, whose sum is σ = 170992733184. Its totient is φ = 14928334848.

The previous prime is 53726566639. The next prime is 53726566681. The reversal of 53726566656 is 65666562735.

It is a super-2 number, since 2×53726566656² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 53726566596 and 53726566605.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 321715885 + ... + 321716051.

It is an arithmetic number, because the mean of its divisors is an integer number (395816512).

Almost surely, 2^53726566656 is an apocalyptic number.

53726566656 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 53726566656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85496366592).

53726566656 is an abundant number, since it is smaller than the sum of its proper divisors (117266166528).

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

53726566656 is a wasteful number, since it uses less digits than its factorization.

53726566656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386 (or 365 counting only the distinct ones).

The product of its digits is 40824000, while the sum is 57.

The spelling of 53726566656 in words is "fifty-three billion, seven hundred twenty-six million, five hundred sixty-six thousand, six hundred fifty-six".