138264445128 has 32 divisors (see below), whose sum is σ = 351327692160. Its totient is φ = 45332604480.

The previous prime is 138264445117. The next prime is 138264445139. The reversal of 138264445128 is 821544462831.

It is an interprime number because it is at equal distance from previous prime (138264445117) and next prime (138264445139).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47220000 + ... + 47222927.

It is an arithmetic number, because the mean of its divisors is an integer number (10978990380).

Almost surely, 2^138264445128 is an apocalyptic number.

It is an amenable number.

138264445128 is an abundant number, since it is smaller than the sum of its proper divisors (213063247032).

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

138264445128 is a wasteful number, since it uses less digits than its factorization.

138264445128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94442997 (or 94442993 counting only the distinct ones).

The product of its digits is 1474560, while the sum is 48.

The spelling of 138264445128 in words is "one hundred thirty-eight billion, two hundred sixty-four million, four hundred forty-five thousand, one hundred twenty-eight".