161179986240 has 896 divisors, whose sum is σ = 724058496000. Its totient is φ = 32829898752.

The previous prime is 161179986181. The next prime is 161179986259. The reversal of 161179986240 is 42689971161.

161179986240 is a `hidden beast` number, since 1 + 6 + 1 + 1 + 7 + 9 + 9 + 8 + 624 + 0 = 666.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 22797426 + ... + 22804494.

It is an arithmetic number, because the mean of its divisors is an integer number (808101000).

Almost surely, 2^161179986240 is an apocalyptic number.

161179986240 is a gapful number since it is divisible by the number (10) 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 161179986240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (362029248000).

161179986240 is an abundant number, since it is smaller than the sum of its proper divisors (562878509760).

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

161179986240 is a wasteful number, since it uses less digits than its factorization.

161179986240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7144 (or 7128 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 54.

The spelling of 161179986240 in words is "one hundred sixty-one billion, one hundred seventy-nine million, nine hundred eighty-six thousand, two hundred forty".