520663145209920 has 280 divisors, whose sum is σ = 1895162279613504. Its totient is φ = 135614586369024.

The previous prime is 520663145209873. The next prime is 520663145209931. The reversal of 520663145209920 is 29902541366025.

520663145209920 is a `hidden beast` number, since 5 + 2 + 0 + 6 + 6 + 3 + 1 + 4 + 520 + 99 + 20 = 666.

It is a super-2 number, since 2×520663145209920² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 232458844 + ... + 234687963.

Almost surely, 2^{520663145209920} is an apocalyptic number.

It is an amenable number.

520663145209920 is an abundant number, since it is smaller than the sum of its proper divisors (1374499134403584).

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

520663145209920 is a wasteful number, since it uses less digits than its factorization.

520663145209920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467146879 (or 467146860 counting only the distinct ones).

The product of its (nonzero) digits is 6998400, while the sum is 54.

The spelling of 520663145209920 in words is "five hundred twenty trillion, six hundred sixty-three billion, one hundred forty-five million, two hundred nine thousand, nine hundred twenty".