138776164 has 6 divisors (see below), whose sum is σ = 242858294. Its totient is φ = 69388080.

The previous prime is 138776153. The next prime is 138776167. The reversal of 138776164 is 461677831.

It can be written as a sum of positive squares in only one way, i.e., 135536164 + 3240000 = 11642^2 + 1800^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 138776164.

It is not an unprimeable number, because it can be changed into a prime (138776167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17347017 + ... + 17347024.

Almost surely, 2^138776164 is an apocalyptic number.

It is an amenable number.

138776164 is a deficient number, since it is larger than the sum of its proper divisors (104082130).

138776164 is a wasteful number, since it uses less digits than its factorization.

138776164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34694045 (or 34694043 counting only the distinct ones).

The product of its digits is 169344, while the sum is 43.

The square root of 138776164 is about 11780.3295369866. The cubic root of 138776164 is about 517.7319414290.

The spelling of 138776164 in words is "one hundred thirty-eight million, seven hundred seventy-six thousand, one hundred sixty-four".