53508463668 has 216 divisors, whose sum is σ = 152704616064. Its totient is φ = 15777780480.

The previous prime is 53508463661. The next prime is 53508463693. The reversal of 53508463668 is 86636480535.

It is a happy number.

53508463668 is a `hidden beast` number, since 5 + 3 + 508 + 46 + 36 + 68 = 666.

53508463668 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53508463661) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 86723296 + ... + 86723912.

Almost surely, 2^53508463668 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 53508463668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76352308032).

53508463668 is an abundant number, since it is smaller than the sum of its proper divisors (99196152396).

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

53508463668 is a wasteful number, since it uses less digits than its factorization.

53508463668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1155 (or 1139 counting only the distinct ones).

The product of its (nonzero) digits is 12441600, while the sum is 54.

The spelling of 53508463668 in words is "fifty-three billion, five hundred eight million, four hundred sixty-three thousand, six hundred sixty-eight".