163172805664 has 48 divisors (see below), whose sum is σ = 353347063776. Its totient is φ = 74169437760.

The previous prime is 163172805557. The next prime is 163172805739. The reversal of 163172805664 is 466508271361.

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, 1872942 + ... + 1958125.

It is an arithmetic number, because the mean of its divisors is an integer number (7361397162).

Almost surely, 2^163172805664 is an apocalyptic number.

It is an amenable number.

163172805664 is an abundant number, since it is smaller than the sum of its proper divisors (190174258112).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

163172805664 is an equidigital number, since it uses as much as digits as its factorization.

163172805664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3831110 (or 3831080 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 49.

The spelling of 163172805664 in words is "one hundred sixty-three billion, one hundred seventy-two million, eight hundred five thousand, six hundred sixty-four".