161979848999936 has 264 divisors, whose sum is σ = 371922971015232. Its totient is φ = 70324688896000.

The previous prime is 161979848999929. The next prime is 161979848999981. The reversal of 161979848999936 is 639999848979161.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1997663651 + ... + 1997744733.

Almost surely, 2^{161979848999936} is an apocalyptic number.

161979848999936 is a gapful number since it is divisible by the number (16) 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 161979848999936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185961485507616).

161979848999936 is an abundant number, since it is smaller than the sum of its proper divisors (209943122015296).

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

161979848999936 is a wasteful number, since it uses less digits than its factorization.

161979848999936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81849 (or 81820 counting only the distinct ones).

The product of its digits is 102852965376, while the sum is 98.

The spelling of 161979848999936 in words is "one hundred sixty-one trillion, nine hundred seventy-nine billion, eight hundred forty-eight million, nine hundred ninety-nine thousand, nine hundred thirty-six".