138164056 has 8 divisors (see below), whose sum is σ = 259057620. Its totient is φ = 69082024.

The previous prime is 138164053. The next prime is 138164069. The reversal of 138164056 is 650461831.

It is a happy number.

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

It is a super-2 number, since 2×138164056² = 38178612740742272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138164051) 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 as a sum of consecutive naturals, namely, 8635246 + ... + 8635261.

Almost surely, 2^138164056 is an apocalyptic number.

It is an amenable number.

138164056 is a deficient number, since it is larger than the sum of its proper divisors (120893564).

138164056 is a wasteful number, since it uses less digits than its factorization.

138164056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17270513 (or 17270509 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 138164056 is about 11754.3207374990. The cubic root of 138164056 is about 516.9696228537.

The spelling of 138164056 in words is "one hundred thirty-eight million, one hundred sixty-four thousand, fifty-six".