138145064 has 8 divisors (see below), whose sum is σ = 259022010. Its totient is φ = 69072528.

The previous prime is 138145027. The next prime is 138145069. The reversal of 138145064 is 460541831.

138145064 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 79744900 + 58400164 = 8930^2 + 7642^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 138145064.

It is not an unprimeable number, because it can be changed into a prime (138145069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8634059 + ... + 8634074.

Almost surely, 2^138145064 is an apocalyptic number.

It is an amenable number.

138145064 is a deficient number, since it is larger than the sum of its proper divisors (120876946).

138145064 is a wasteful number, since it uses less digits than its factorization.

138145064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17268139 (or 17268135 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 138145064 is about 11753.5128365949. The cubic root of 138145064 is about 516.9459342590.

Adding to 138145064 its reverse (460541831), we get a palindrome (598686895).

The spelling of 138145064 in words is "one hundred thirty-eight million, one hundred forty-five thousand, sixty-four".