161724053700 has 432 divisors, whose sum is σ = 583608480000. Its totient is φ = 37046419200.

The previous prime is 161724053677. The next prime is 161724053717. The reversal of 161724053700 is 7350427161.

It is a happy number.

161724053700 is a `hidden beast` number, since 1 + 617 + 2 + 4 + 0 + 5 + 37 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 93861039 + ... + 93862761.

Almost surely, 2^161724053700 is an apocalyptic number.

161724053700 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 161724053700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (291804240000).

161724053700 is an abundant number, since it is smaller than the sum of its proper divisors (421884426300).

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

161724053700 is a wasteful number, since it uses less digits than its factorization.

161724053700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2272 (or 2262 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The spelling of 161724053700 in words is "one hundred sixty-one billion, seven hundred twenty-four million, fifty-three thousand, seven hundred".