723135323520 has 512 divisors, whose sum is σ = 2758711910400. Its totient is φ = 178498805760.

The previous prime is 723135323483. The next prime is 723135323527. The reversal of 723135323520 is 25323531327.

723135323520 is a `hidden beast` number, since 7 + 231 + 353 + 23 + 52 + 0 = 666.

It is a super-2 number, since 2×723135323520² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (723135323527) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12291294 + ... + 12349986.

It is an arithmetic number, because the mean of its divisors is an integer number (5388109200).

Almost surely, 2^723135323520 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 723135323520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1379355955200).

723135323520 is an abundant number, since it is smaller than the sum of its proper divisors (2035576586880).

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

723135323520 is a wasteful number, since it uses less digits than its factorization.

723135323520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58775 (or 58757 counting only the distinct ones).

The product of its (nonzero) digits is 113400, while the sum is 36.

Adding to 723135323520 its reverse (25323531327), we get a palindrome (748458854847).

The spelling of 723135323520 in words is "seven hundred twenty-three billion, one hundred thirty-five million, three hundred twenty-three thousand, five hundred twenty".