163556205562544 has 20 divisors (see below), whose sum is σ = 316890468118224. Its totient is φ = 81778020241728.

The previous prime is 163556205562523. The next prime is 163556205562571. The reversal of 163556205562544 is 445265502655361.

It is a Smith number, since the sum of its digits (59) coincides with the sum of the digits of its prime factors.

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, 13160354 + ... + 22367550.

Almost surely, 2^{163556205562544} is an apocalyptic number.

It is an amenable number.

163556205562544 is a deficient number, since it is larger than the sum of its proper divisors (153334262555680).

163556205562544 is a wasteful number, since it uses less digits than its factorization.

163556205562544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10317452 (or 10317446 counting only the distinct ones).

The product of its (nonzero) digits is 129600000, while the sum is 59.

The spelling of 163556205562544 in words is "one hundred sixty-three trillion, five hundred fifty-six billion, two hundred five million, five hundred sixty-two thousand, five hundred forty-four".