169979745796 has 63 divisors (see below), whose sum is σ = 347619960597. Its totient is φ = 72727250400.

The previous prime is 169979745779. The next prime is 169979745797. The reversal of 169979745796 is 697547979961.

The square root of 169979745796 is 412286.

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., 142873416196 + 27106329600 = 377986^2 + 164640^2 .

It is a super-2 number, since 2×169979745796² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (169979745797) by changing a digit.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 282827896 + ... + 282828496.

Almost surely, 2^169979745796 is an apocalyptic number.

169979745796 is the 412286-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 169979745796

169979745796 is an abundant number, since it is smaller than the sum of its proper divisors (177640214801).

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

169979745796 is an frugal number, since it uses more digits than its factorization.

169979745796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1248 (or 610 counting only the distinct ones).

The product of its digits is 1620304560, while the sum is 79.

The spelling of 169979745796 in words is "one hundred sixty-nine billion, nine hundred seventy-nine million, seven hundred forty-five thousand, seven hundred ninety-six".