138064260438 has 48 divisors (see below), whose sum is σ = 328228271280. Its totient is φ = 41679772992.

The previous prime is 138064260359. The next prime is 138064260469. The reversal of 138064260438 is 834062460831.

138064260438 is a `hidden beast` number, since 1 + 3 + 8 + 0 + 6 + 4 + 2 + 604 + 38 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 138064260393 and 138064260402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5553808 + ... + 5578611.

It is an arithmetic number, because the mean of its divisors is an integer number (6838088985).

Almost surely, 2^138064260438 is an apocalyptic number.

138064260438 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

138064260438 is an abundant number, since it is smaller than the sum of its proper divisors (190164010842).

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

138064260438 is a wasteful number, since it uses less digits than its factorization.

138064260438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11132493 (or 11132490 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 45.

The spelling of 138064260438 in words is "one hundred thirty-eight billion, sixty-four million, two hundred sixty thousand, four hundred thirty-eight".