163371172864 has 99 divisors (see below), whose sum is σ = 347391152197. Its totient is φ = 76777078784.

The previous prime is 163371172859. The next prime is 163371172891. The reversal of 163371172864 is 468271173361.

The square root of 163371172864 is 404192.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 127192089600 + 36179083264 = 356640^2 + 190208^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 219880077 + ... + 219880819.

Almost surely, 2^163371172864 is an apocalyptic number.

163371172864 is the 404192-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 163371172864

163371172864 is an abundant number, since it is smaller than the sum of its proper divisors (184019979333).

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

163371172864 is an frugal number, since it uses more digits than its factorization.

163371172864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1540 (or 762 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 49.

Multiplying 163371172864 by its sum of digits (49), we get a square (8005187470336 = 2829344²).

The spelling of 163371172864 in words is "one hundred sixty-three billion, three hundred seventy-one million, one hundred seventy-two thousand, eight hundred sixty-four".