993235478544 has 135 divisors (see below), whose sum is σ = 2834925338973. Its totient is φ = 324624433536.

The previous prime is 993235478537. The next prime is 993235478591. The reversal of 993235478544 is 445874532399.

The square root of 993235478544 is 996612.

It is a perfect power (a square), and thus also a powerful number.

993235478544 is a `hidden beast` number, since 9 + 9 + 3 + 2 + 3 + 547 + 85 + 4 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 716020592400 + 277214886144 = 846180^2 + 526512^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 633844449 + ... + 633846015.

Almost surely, 2^993235478544 is an apocalyptic number.

993235478544 is the 996612-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 993235478544

993235478544 is an abundant number, since it is smaller than the sum of its proper divisors (1841689860429).

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

993235478544 is an equidigital number, since it uses as much as digits as its factorization.

993235478544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3254 (or 1625 counting only the distinct ones).

The product of its digits is 130636800, while the sum is 63.

The spelling of 993235478544 in words is "nine hundred ninety-three billion, two hundred thirty-five million, four hundred seventy-eight thousand, five hundred forty-four".