169978339212 has 192 divisors, whose sum is σ = 461748833280. Its totient is φ = 48096870400.

The previous prime is 169978339169. The next prime is 169978339241. The reversal of 169978339212 is 212933879961.

It is a super-3 number, since 3×169978339212³ (a number of 35 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 207037762 + ... + 207038582.

It is an arithmetic number, because the mean of its divisors is an integer number (2404941840).

Almost surely, 2^169978339212 is an apocalyptic number.

169978339212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 169978339212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230874416640).

169978339212 is an abundant number, since it is smaller than the sum of its proper divisors (291770494068).

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

169978339212 is a wasteful number, since it uses less digits than its factorization.

169978339212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1472 (or 1470 counting only the distinct ones).

The product of its digits is 8817984, while the sum is 60.

The spelling of 169978339212 in words is "one hundred sixty-nine billion, nine hundred seventy-eight million, three hundred thirty-nine thousand, two hundred twelve".