161366424340 has 192 divisors, whose sum is σ = 390451622400. Its totient is φ = 55477094400.

The previous prime is 161366424283. The next prime is 161366424389. The reversal of 161366424340 is 43424663161.

It is a junction number, because it is equal to n+sod(n) for n = 161366424293 and 161366424302.

It is a congruent number.

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, 71116726 + ... + 71118994.

It is an arithmetic number, because the mean of its divisors is an integer number (2033602200).

Almost surely, 2^161366424340 is an apocalyptic number.

161366424340 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 161366424340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195225811200).

161366424340 is an abundant number, since it is smaller than the sum of its proper divisors (229085198060).

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

161366424340 is a wasteful number, since it uses less digits than its factorization.

161366424340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2546 (or 2544 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 40.

The spelling of 161366424340 in words is "one hundred sixty-one billion, three hundred sixty-six million, four hundred twenty-four thousand, three hundred forty".