161073900 has 216 divisors, whose sum is σ = 562307760. Its totient is φ = 39536640.

The previous prime is 161073893. The next prime is 161073901. The reversal of 161073900 is 9370161.

It is a super-2 number, since 2×161073900² = 51889602522420000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (161073901) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 456124 + ... + 456476.

Almost surely, 2^161073900 is an apocalyptic number.

161073900 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 161073900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (281153880).

161073900 is an abundant number, since it is smaller than the sum of its proper divisors (401233860).

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

161073900 is a wasteful number, since it uses less digits than its factorization.

161073900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402 (or 376 counting only the distinct ones).

The product of its (nonzero) digits is 1134, while the sum is 27.

The square root of 161073900 is about 12691.4892743129. The cubic root of 161073900 is about 544.0954047998.

The spelling of 161073900 in words is "one hundred sixty-one million, seventy-three thousand, nine hundred".