523345231443540 has 384 divisors, whose sum is σ = 1630027308349440. Its totient is φ = 124387860889600.

The previous prime is 523345231443539. The next prime is 523345231443563. The reversal of 523345231443540 is 45344132543325.

It is a self number, because there is not a number n which added to its sum of digits gives 523345231443540.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 22792777660 + ... + 22792800620.

It is an arithmetic number, because the mean of its divisors is an integer number (4244862782160).

Almost surely, 2^{523345231443540} 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 523345231443540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (815013654174720).

523345231443540 is an abundant number, since it is smaller than the sum of its proper divisors (1106682076905900).

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

523345231443540 is a wasteful number, since it uses less digits than its factorization.

523345231443540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24583 (or 24581 counting only the distinct ones).

The product of its (nonzero) digits is 10368000, while the sum is 48.

Adding to 523345231443540 its reverse (45344132543325), we get a palindrome (568689363986865).

The spelling of 523345231443540 in words is "five hundred twenty-three trillion, three hundred forty-five billion, two hundred thirty-one million, four hundred forty-three thousand, five hundred forty".