161090601 has 16 divisors (see below), whose sum is σ = 253390848. Its totient is φ = 89082000.

The previous prime is 161090593. The next prime is 161090603. The reversal of 161090601 is 106090161.

It is not a de Polignac number, because 161090601 - 2³ = 161090593 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (161090603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123075 + ... + 124376.

It is an arithmetic number, because the mean of its divisors is an integer number (15836928).

Almost surely, 2^161090601 is an apocalyptic number.

It is an amenable number.

161090601 is a deficient number, since it is larger than the sum of its proper divisors (92300247).

161090601 is a wasteful number, since it uses less digits than its factorization.

161090601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247492.

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 161090601 is about 12692.1472178666. The cubic root of 161090601 is about 544.1142090533.

The spelling of 161090601 in words is "one hundred sixty-one million, ninety thousand, six hundred one".