169998711481 has 9 divisors (see below), whose sum is σ = 171708103269. Its totient is φ = 168306183036.

The previous prime is 169998711439. The next prime is 169998711497. The reversal of 169998711481 is 184117899961.

The square root of 169998711481 is 412309.

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

It is not a de Polignac number, because 169998711481 - 2¹⁵ = 169998678713 is a prime.

It is a super-2 number, since 2×169998711481² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (169998714481) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 42465826 + ... + 42469828.

It is an arithmetic number, because the mean of its divisors is an integer number (19078678141).

Almost surely, 2^169998711481 is an apocalyptic number.

169998711481 is the 412309-th square number.

169998711481 is the 206155-th centered octagonal number.

It is an amenable number.

169998711481 is a deficient number, since it is larger than the sum of its proper divisors (1709391788).

169998711481 is an frugal number, since it uses more digits than its factorization.

169998711481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8212 (or 4106 counting only the distinct ones).

The product of its digits is 7838208, while the sum is 64.

Multiplying 169998711481 by its sum of digits (64), we get a square (10879917534784 = 3298472²).

The spelling of 169998711481 in words is "one hundred sixty-nine billion, nine hundred ninety-eight million, seven hundred eleven thousand, four hundred eighty-one".