520121397072 has 80 divisors (see below), whose sum is σ = 1387939201920. Its totient is φ = 167712846336.

The previous prime is 520121397067. The next prime is 520121397077. The reversal of 520121397072 is 270793121025.

It is an interprime number because it is at equal distance from previous prime (520121397067) and next prime (520121397077).

It is a self number, because there is not a number n which added to its sum of digits gives 520121397072.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520121397077) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 539172 + ... + 1153667.

It is an arithmetic number, because the mean of its divisors is an integer number (17349240024).

Almost surely, 2^520121397072 is an apocalyptic number.

It is an amenable number.

520121397072 is an abundant number, since it is smaller than the sum of its proper divisors (867817804848).

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

520121397072 is a wasteful number, since it uses less digits than its factorization.

520121397072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1693060 (or 1693054 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 39.

The spelling of 520121397072 in words is "five hundred twenty billion, one hundred twenty-one million, three hundred ninety-seven thousand, seventy-two".