163503221205425 has 24 divisors (see below), whose sum is σ = 208283075280000. Its totient is φ = 127230997164480.

The previous prime is 163503221205383. The next prime is 163503221205473. The reversal of 163503221205425 is 524502122305361.

It is not a de Polignac number, because 163503221205425 - 2³⁶ = 163434501728689 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22022105 + ... + 28495254.

It is an arithmetic number, because the mean of its divisors is an integer number (8678461470000).

Almost surely, 2^{163503221205425} is an apocalyptic number.

It is an amenable number.

163503221205425 is a deficient number, since it is larger than the sum of its proper divisors (44779854074575).

163503221205425 is a wasteful number, since it uses less digits than its factorization.

163503221205425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50520905 (or 50520900 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 41.

The spelling of 163503221205425 in words is "one hundred sixty-three trillion, five hundred three billion, two hundred twenty-one million, two hundred five thousand, four hundred twenty-five".