521363504444 has 12 divisors (see below), whose sum is σ = 917113523424. Its totient is φ = 259331069184.

The previous prime is 521363504437. The next prime is 521363504477. The reversal of 521363504444 is 444405363125.

It is a super-2 number, since 2×521363504444² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 337669892 + ... + 337671435.

It is an arithmetic number, because the mean of its divisors is an integer number (76426126952).

Almost surely, 2^521363504444 is an apocalyptic number.

It is an amenable number.

521363504444 is a deficient number, since it is larger than the sum of its proper divisors (395750018980).

521363504444 is a wasteful number, since it uses less digits than its factorization.

521363504444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 675341524 (or 675341522 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 41.

Adding to 521363504444 its reverse (444405363125), we get a palindrome (965768867569).

The spelling of 521363504444 in words is "five hundred twenty-one billion, three hundred sixty-three million, five hundred four thousand, four hundred forty-four".