315520045563320 has 128 divisors (see below), whose sum is σ = 765262078963200. Its totient is φ = 116388081739776.

The previous prime is 315520045563293. The next prime is 315520045563323. The reversal of 315520045563320 is 23365540025513.

It is a happy number.

It is a super-2 number, since 2×315520045563320² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315520045563323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4957311737 + ... + 4957375383.

It is an arithmetic number, because the mean of its divisors is an integer number (5978609991900).

Almost surely, 2^{315520045563320} 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 315520045563320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (382631039481600).

315520045563320 is an abundant number, since it is smaller than the sum of its proper divisors (449742033399880).

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

315520045563320 is a wasteful number, since it uses less digits than its factorization.

315520045563320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72657 (or 72653 counting only the distinct ones).

The product of its (nonzero) digits is 1620000, while the sum is 44.

Adding to 315520045563320 its reverse (23365540025513), we get a palindrome (338885585588833).

The spelling of 315520045563320 in words is "three hundred fifteen trillion, five hundred twenty billion, forty-five million, five hundred sixty-three thousand, three hundred twenty".