163503221432566 has 16 divisors (see below), whose sum is σ = 245276976024000. Its totient is φ = 81744229792008.

The previous prime is 163503221432491. The next prime is 163503221432581. The reversal of 163503221432566 is 665234122305361.

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, 1231475701 + ... + 1231608463.

It is an arithmetic number, because the mean of its divisors is an integer number (15329811001500).

Almost surely, 2^{163503221432566} is an apocalyptic number.

163503221432566 is a deficient number, since it is larger than the sum of its proper divisors (81773754591434).

163503221432566 is a wasteful number, since it uses less digits than its factorization.

163503221432566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183723.

The product of its (nonzero) digits is 4665600, while the sum is 49.

The spelling of 163503221432566 in words is "one hundred sixty-three trillion, five hundred three billion, two hundred twenty-one million, four hundred thirty-two thousand, five hundred sixty-six".