140656165 has 12 divisors (see below), whose sum is σ = 182770884. Its totient is φ = 103868544.

The previous prime is 140656163. The next prime is 140656169. The reversal of 140656165 is 561656041.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 51523684 + 89132481 = 7178^2 + 9441^2 .

It is not a de Polignac number, because 140656165 - 2¹ = 140656163 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 140656165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140656163) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 82384 + ... + 84073.

It is an arithmetic number, because the mean of its divisors is an integer number (15230907).

Almost surely, 2^140656165 is an apocalyptic number.

It is an amenable number.

140656165 is a deficient number, since it is larger than the sum of its proper divisors (42114719).

140656165 is a wasteful number, since it uses less digits than its factorization.

140656165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166488 (or 166475 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 140656165 is about 11859.8551846133. The cubic root of 140656165 is about 520.0593682217.

The spelling of 140656165 in words is "one hundred forty million, six hundred fifty-six thousand, one hundred sixty-five".