520401514440 has 128 divisors (see below), whose sum is σ = 1575479808000. Its totient is φ = 137507586048.

The previous prime is 520401514433. The next prime is 520401514541. The reversal of 520401514440 is 44415104025.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 520401514398 and 520401514407.

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, 12308056 + ... + 12350264.

It is an arithmetic number, because the mean of its divisors is an integer number (12308436000).

Almost surely, 2^520401514440 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 520401514440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (787739904000).

520401514440 is an abundant number, since it is smaller than the sum of its proper divisors (1055078293560).

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

520401514440 is a wasteful number, since it uses less digits than its factorization.

520401514440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43159 (or 43155 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 30.

Adding to 520401514440 its reverse (44415104025), we get a palindrome (564816618465).

The spelling of 520401514440 in words is "five hundred twenty billion, four hundred one million, five hundred fourteen thousand, four hundred forty".