9640161 has 24 divisors (see below), whose sum is σ = 14696160. Its totient is φ = 6244128.

The previous prime is 9640129. The next prime is 9640171. The reversal of 9640161 is 1610469.

9640161 is a `hidden beast` number, since 9 + 640 + 16 + 1 = 666.

It is not a de Polignac number, because 9640161 - 2⁵ = 9640129 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9640121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 132021 + ... + 132093.

It is an arithmetic number, because the mean of its divisors is an integer number (612340).

Almost surely, 2^9640161 is an apocalyptic number.

It is an amenable number.

9640161 is a deficient number, since it is larger than the sum of its proper divisors (5055999).

9640161 is an equidigital number, since it uses as much as digits as its factorization.

9640161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222 (or 143 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 9640161 is about 3104.8608664480. The cubic root of 9640161 is about 212.8276725583.

It can be divided in two parts, 9640 and 161, that added together give a square (9801 = 99²).

The spelling of 9640161 in words is "nine million, six hundred forty thousand, one hundred sixty-one".