520679404889 has 16 divisors (see below), whose sum is σ = 608196251520. Its totient is φ = 436527826560.

The previous prime is 520679404853. The next prime is 520679404901. The reversal of 520679404889 is 988404976025.

It is not a de Polignac number, because 520679404889 - 2⁸ = 520679404633 is a prime.

It is a super-2 number, since 2×520679404889² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520679400889) 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, 3329684 + ... + 3482549.

It is an arithmetic number, because the mean of its divisors is an integer number (38012265720).

Almost surely, 2^520679404889 is an apocalyptic number.

It is an amenable number.

520679404889 is a deficient number, since it is larger than the sum of its proper divisors (87516846631).

520679404889 is a wasteful number, since it uses less digits than its factorization.

520679404889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6812480.

The product of its (nonzero) digits is 34836480, while the sum is 62.

The spelling of 520679404889 in words is "five hundred twenty billion, six hundred seventy-nine million, four hundred four thousand, eight hundred eighty-nine".