521339068426 has 32 divisors (see below), whose sum is σ = 873380996928. Its totient is φ = 231344346240.

The previous prime is 521339068421. The next prime is 521339068427. The reversal of 521339068426 is 624860933125.

It is a self number, because there is not a number n which added to its sum of digits gives 521339068426.

It is not an unprimeable number, because it can be changed into a prime (521339068421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1747120 + ... + 2023636.

It is an arithmetic number, because the mean of its divisors is an integer number (27293156154).

Almost surely, 2^521339068426 is an apocalyptic number.

521339068426 is a deficient number, since it is larger than the sum of its proper divisors (352041928502).

521339068426 is a wasteful number, since it uses less digits than its factorization.

521339068426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278566.

The product of its (nonzero) digits is 1866240, while the sum is 49.

The spelling of 521339068426 in words is "five hundred twenty-one billion, three hundred thirty-nine million, sixty-eight thousand, four hundred twenty-six".