521306420104 has 32 divisors (see below), whose sum is σ = 989356213440. Its totient is φ = 257489752000.

The previous prime is 521306420093. The next prime is 521306420143. The reversal of 521306420104 is 401024603125.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 370252 + ... + 1086139.

It is an arithmetic number, because the mean of its divisors is an integer number (30917381670).

Almost surely, 2^521306420104 is an apocalyptic number.

It is an amenable number.

521306420104 is a deficient number, since it is larger than the sum of its proper divisors (468049793336).

521306420104 is a wasteful number, since it uses less digits than its factorization.

521306420104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1456941 (or 1456937 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The spelling of 521306420104 in words is "five hundred twenty-one billion, three hundred six million, four hundred twenty thousand, one hundred four".