138212253466 has 24 divisors (see below), whose sum is σ = 241320059136. Its totient is φ = 59196052440.

The previous prime is 138212253461. The next prime is 138212253497. The reversal of 138212253466 is 664352212831.

It is not an unprimeable number, because it can be changed into a prime (138212253461) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 294906 + ... + 602821.

It is an arithmetic number, because the mean of its divisors is an integer number (10055002464).

Almost surely, 2^138212253466 is an apocalyptic number.

138212253466 is a deficient number, since it is larger than the sum of its proper divisors (103107805670).

138212253466 is a wasteful number, since it uses less digits than its factorization.

138212253466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 899314 (or 899307 counting only the distinct ones).

The product of its digits is 414720, while the sum is 43.

The spelling of 138212253466 in words is "one hundred thirty-eight billion, two hundred twelve million, two hundred fifty-three thousand, four hundred sixty-six".