161335604 has 24 divisors (see below), whose sum is σ = 288707328. Its totient is φ = 78859040.

The previous prime is 161335597. The next prime is 161335609. The reversal of 161335604 is 406533161.

It is a happy number.

161335604 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 not an unprimeable number, because it can be changed into a prime (161335609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64709 + ... + 67155.

It is an arithmetic number, because the mean of its divisors is an integer number (12029472).

Almost surely, 2^161335604 is an apocalyptic number.

It is an amenable number.

161335604 is a deficient number, since it is larger than the sum of its proper divisors (127371724).

161335604 is a wasteful number, since it uses less digits than its factorization.

161335604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2815 (or 2813 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 161335604 is about 12701.7953061762. The cubic root of 161335604 is about 544.3899174355.

Adding to 161335604 its reverse (406533161), we get a palindrome (567868765).

The spelling of 161335604 in words is "one hundred sixty-one million, three hundred thirty-five thousand, six hundred four".