161001688 has 16 divisors (see below), whose sum is σ = 302040000. Its totient is φ = 80457696.

The previous prime is 161001683. The next prime is 161001697. The reversal of 161001688 is 886100161.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161001683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14998 + ... + 23386.

It is an arithmetic number, because the mean of its divisors is an integer number (18877500).

Almost surely, 2^161001688 is an apocalyptic number.

It is an amenable number.

161001688 is a deficient number, since it is larger than the sum of its proper divisors (141038312).

161001688 is a wasteful number, since it uses less digits than its factorization.

161001688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10794 (or 10790 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 161001688 is about 12688.6440567935. The cubic root of 161001688 is about 544.0140837617.

The spelling of 161001688 in words is "one hundred sixty-one million, one thousand, six hundred eighty-eight".