520673453600 has 72 divisors (see below), whose sum is σ = 1272022530660. Its totient is φ = 208117253120.

The previous prime is 520673453539. The next prime is 520673453603. The reversal of 520673453600 is 6354376025.

It can be written as a sum of positive squares in 6 ways, for example, as 386749659664 + 133923793936 = 621892^2 + 365956^2 .

It is a super-2 number, since 2×520673453600² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (520673453603) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 861386 + ... + 1335414.

Almost surely, 2^520673453600 is an apocalyptic number.

520673453600 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 520673453600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (636011265330).

520673453600 is an abundant number, since it is smaller than the sum of its proper divisors (751349077060).

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

520673453600 is a wasteful number, since it uses less digits than its factorization.

520673453600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475422 (or 475409 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 41.

The spelling of 520673453600 in words is "five hundred twenty billion, six hundred seventy-three million, four hundred fifty-three thousand, six hundred".