521525664105 has 32 divisors (see below), whose sum is σ = 843932369280. Its totient is φ = 274999864320.

The previous prime is 521525664091. The next prime is 521525664113. The reversal of 521525664105 is 501466525125.

It is not a de Polignac number, because 521525664105 - 2¹⁷ = 521525533033 is a prime.

It is a super-2 number, since 2×521525664105² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16462 + ... + 1021431.

It is an arithmetic number, because the mean of its divisors is an integer number (26372886540).

Almost surely, 2^521525664105 is an apocalyptic number.

It is an amenable number.

521525664105 is a deficient number, since it is larger than the sum of its proper divisors (322406705175).

521525664105 is a wasteful number, since it uses less digits than its factorization.

521525664105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1038281.

The product of its (nonzero) digits is 360000, while the sum is 42.

The spelling of 521525664105 in words is "five hundred twenty-one billion, five hundred twenty-five million, six hundred sixty-four thousand, one hundred five".