138356420268 has 48 divisors (see below), whose sum is σ = 356637980160. Its totient is φ = 41395473600.

The previous prime is 138356420249. The next prime is 138356420273. The reversal of 138356420268 is 862024653831.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6623463 + ... + 6644318.

It is an arithmetic number, because the mean of its divisors is an integer number (7429957920).

Almost surely, 2^138356420268 is an apocalyptic number.

It is an amenable number.

138356420268 is an abundant number, since it is smaller than the sum of its proper divisors (218281559892).

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

138356420268 is a wasteful number, since it uses less digits than its factorization.

138356420268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13267878 (or 13267876 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 48.

The spelling of 138356420268 in words is "one hundred thirty-eight billion, three hundred fifty-six million, four hundred twenty thousand, two hundred sixty-eight".