161132604 has 24 divisors (see below), whose sum is σ = 377890128. Its totient is φ = 53437440.

The previous prime is 161132593. The next prime is 161132651. The reversal of 161132604 is 406231161.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31717 + ... + 36444.

It is an arithmetic number, because the mean of its divisors is an integer number (15745422).

Almost surely, 2^161132604 is an apocalyptic number.

It is an amenable number.

161132604 is an abundant number, since it is smaller than the sum of its proper divisors (216757524).

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

161132604 is a wasteful number, since it uses less digits than its factorization.

161132604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68365 (or 68363 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 161132604 is about 12693.8017945768. The cubic root of 161132604 is about 544.1614959898.

Adding to 161132604 its reverse (406231161), we get a palindrome (567363765).

The spelling of 161132604 in words is "one hundred sixty-one million, one hundred thirty-two thousand, six hundred four".