138775002618 has 32 divisors (see below), whose sum is σ = 330991312896. Its totient is φ = 37926087408.

The previous prime is 138775002617. The next prime is 138775002643. The reversal of 138775002618 is 816200577831.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (138775002617) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71828746 + ... + 71830677.

It is an arithmetic number, because the mean of its divisors is an integer number (10343478528).

Almost surely, 2^138775002618 is an apocalyptic number.

138775002618 is an abundant number, since it is smaller than the sum of its proper divisors (192216310278).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138775002618 is a wasteful number, since it uses less digits than its factorization.

138775002618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143659458.

The product of its (nonzero) digits is 564480, while the sum is 48.

The spelling of 138775002618 in words is "one hundred thirty-eight billion, seven hundred seventy-five million, two thousand, six hundred eighteen".