138148664 has 32 divisors (see below), whose sum is σ = 275004720. Its totient is φ = 64836096.

The previous prime is 138148607. The next prime is 138148667. The reversal of 138148664 is 466841831.

138148664 is nontrivially palindromic in base 16.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138148667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59102 + ... + 61394.

Almost surely, 2^138148664 is an apocalyptic number.

It is an amenable number.

138148664 is a deficient number, since it is larger than the sum of its proper divisors (136856056).

138148664 is a wasteful number, since it uses less digits than its factorization.

138148664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2759 (or 2755 counting only the distinct ones).

The product of its digits is 110592, while the sum is 41.

The square root of 138148664 is about 11753.6659813013. The cubic root of 138148664 is about 516.9504246817.

The spelling of 138148664 in words is "one hundred thirty-eight million, one hundred forty-eight thousand, six hundred sixty-four".