521744921054 has 16 divisors (see below), whose sum is σ = 894429247488. Its totient is φ = 223602620472.

The previous prime is 521744921023. The next prime is 521744921063. The reversal of 521744921054 is 450129447125.

It is a junction number, because it is equal to n+sod(n) for n = 521744920996 and 521744921014.

It is a congruent number.

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, 2193647 + ... + 2419829.

It is an arithmetic number, because the mean of its divisors is an integer number (55901827968).

Almost surely, 2^521744921054 is an apocalyptic number.

521744921054 is a deficient number, since it is larger than the sum of its proper divisors (372684326434).

521744921054 is a wasteful number, since it uses less digits than its factorization.

521744921054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390959.

The product of its (nonzero) digits is 403200, while the sum is 44.

The spelling of 521744921054 in words is "five hundred twenty-one billion, seven hundred forty-four million, nine hundred twenty-one thousand, fifty-four".