161794500 has 192 divisors, whose sum is σ = 567490560. Its totient is φ = 34992000.

The previous prime is 161794483. The next prime is 161794517. The reversal of 161794500 is 5497161.

It is an interprime number because it is at equal distance from previous prime (161794483) and next prime (161794517).

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, 199095 + ... + 199905.

It is an arithmetic number, because the mean of its divisors is an integer number (2955680).

Almost surely, 2^161794500 is an apocalyptic number.

161794500 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 161794500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (283745280).

161794500 is an abundant number, since it is smaller than the sum of its proper divisors (405696060).

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

161794500 is a wasteful number, since it uses less digits than its factorization.

161794500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 859 (or 847 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 161794500 is about 12719.8466971894. The cubic root of 161794500 is about 544.9055752020.

The spelling of 161794500 in words is "one hundred sixty-one million, seven hundred ninety-four thousand, five hundred".