521054406326 has 4 divisors (see below), whose sum is σ = 781581609492. Its totient is φ = 260527203162.

The previous prime is 521054406317. The next prime is 521054406359. The reversal of 521054406326 is 623604450125.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 521054406326.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130263601580 + ... + 130263601583.

It is an arithmetic number, because the mean of its divisors is an integer number (195395402373).

Almost surely, 2^521054406326 is an apocalyptic number.

521054406326 is a deficient number, since it is larger than the sum of its proper divisors (260527203166).

521054406326 is a wasteful number, since it uses less digits than its factorization.

521054406326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260527203165.

The product of its (nonzero) digits is 172800, while the sum is 38.

The spelling of 521054406326 in words is "five hundred twenty-one billion, fifty-four million, four hundred six thousand, three hundred twenty-six".