161016604 has 48 divisors (see below), whose sum is σ = 335835136. Its totient is φ = 66096000.

The previous prime is 161016599. The next prime is 161016623. The reversal of 161016604 is 406610161.

161016604 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 88504 + ... + 90304.

Almost surely, 2^161016604 is an apocalyptic number.

161016604 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 161016604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (167917568).

161016604 is an abundant number, since it is smaller than the sum of its proper divisors (174818532).

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

161016604 is a wasteful number, since it uses less digits than its factorization.

161016604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1946 (or 1944 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 161016604 is about 12689.2318128404. The cubic root of 161016604 is about 544.0308833029.

Adding to 161016604 its reverse (406610161), we get a palindrome (567626765).

The spelling of 161016604 in words is "one hundred sixty-one million, sixteen thousand, six hundred four".