520749400651840 has 224 divisors, whose sum is σ = 1267695148648320. Its totient is φ = 203708876292096.

The previous prime is 520749400651829. The next prime is 520749400651867. The reversal of 520749400651840 is 48156004947025.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2361897126 + ... + 2362117594.

It is an arithmetic number, because the mean of its divisors is an integer number (5659353342180).

Almost surely, 2^{520749400651840} 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 520749400651840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (633847574324160).

520749400651840 is an abundant number, since it is smaller than the sum of its proper divisors (746945747996480).

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

520749400651840 is a wasteful number, since it uses less digits than its factorization.

520749400651840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221469 (or 221459 counting only the distinct ones).

The product of its (nonzero) digits is 9676800, while the sum is 55.

The spelling of 520749400651840 in words is "five hundred twenty trillion, seven hundred forty-nine billion, four hundred million, six hundred fifty-one thousand, eight hundred forty".