520661025124 has 6 divisors (see below), whose sum is σ = 911156793974. Its totient is φ = 260330512560.

The previous prime is 520661025121. The next prime is 520661025151. The reversal of 520661025124 is 421520166025.

It can be written as a sum of positive squares in only one way, i.e., 517953696100 + 2707329024 = 719690^2 + 52032^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 520661025124.

It is not an unprimeable number, because it can be changed into a prime (520661025121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65082628137 + ... + 65082628144.

Almost surely, 2^520661025124 is an apocalyptic number.

It is an amenable number.

520661025124 is a deficient number, since it is larger than the sum of its proper divisors (390495768850).

520661025124 is a wasteful number, since it uses less digits than its factorization.

520661025124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130165256285 (or 130165256283 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

The spelling of 520661025124 in words is "five hundred twenty billion, six hundred sixty-one million, twenty-five thousand, one hundred twenty-four".