161944601 has 16 divisors (see below), whose sum is σ = 211042944. Its totient is φ = 120593664.

The previous prime is 161944571. The next prime is 161944621. The reversal of 161944601 is 106449161.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 161944601 - 2²⁶ = 94835737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161944621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50795 + ... + 53888.

It is an arithmetic number, because the mean of its divisors is an integer number (13190184).

Almost surely, 2^161944601 is an apocalyptic number.

It is an amenable number.

161944601 is a deficient number, since it is larger than the sum of its proper divisors (49098343).

161944601 is a wasteful number, since it uses less digits than its factorization.

161944601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104720.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 161944601 is about 12725.7455970171. The cubic root of 161944601 is about 545.0740308491.

The spelling of 161944601 in words is "one hundred sixty-one million, nine hundred forty-four thousand, six hundred one".