161724910144 has 112 divisors (see below), whose sum is σ = 391362793600. Its totient is φ = 64763006976.

The previous prime is 161724910093. The next prime is 161724910183. The reversal of 161724910144 is 441019427161.

It is a tau number, because it is divible by the number of its divisors (112).

It is a super-2 number, since 2×161724910144² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161724910097 and 161724910106.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 491242 + ... + 751510.

Almost surely, 2^161724910144 is an apocalyptic number.

161724910144 is a gapful number since it is divisible by the number (14) 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 161724910144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195681396800).

161724910144 is an abundant number, since it is smaller than the sum of its proper divisors (229637883456).

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

161724910144 is a wasteful number, since it uses less digits than its factorization.

161724910144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260380 (or 260370 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 40.

The spelling of 161724910144 in words is "one hundred sixty-one billion, seven hundred twenty-four million, nine hundred ten thousand, one hundred forty-four".