140191664 has 40 divisors (see below), whose sum is σ = 277690560. Its totient is φ = 68544000.

The previous prime is 140191661. The next prime is 140191679. The reversal of 140191664 is 466191041.

It is a happy number.

140191664 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 140191664.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140191661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 232964 + ... + 233564.

It is an arithmetic number, because the mean of its divisors is an integer number (6942264).

Almost surely, 2^140191664 is an apocalyptic number.

It is an amenable number.

140191664 is a deficient number, since it is larger than the sum of its proper divisors (137498896).

140191664 is a wasteful number, since it uses less digits than its factorization.

140191664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909 (or 903 counting only the distinct ones).

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

The square root of 140191664 is about 11840.2560783118. The cubic root of 140191664 is about 519.4862578936.

The spelling of 140191664 in words is "one hundred forty million, one hundred ninety-one thousand, six hundred sixty-four".