138194456875 has 10 divisors (see below), whose sum is σ = 172687794092. Its totient is φ = 110555565000.

The previous prime is 138194456837. The next prime is 138194456891. The reversal of 138194456875 is 578654491831.

It is not a de Polignac number, because 138194456875 - 2¹⁷ = 138194325803 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 110554941 + ... + 110556190.

Almost surely, 2^138194456875 is an apocalyptic number.

138194456875 is a deficient number, since it is larger than the sum of its proper divisors (34493337217).

138194456875 is an frugal number, since it uses more digits than its factorization.

138194456875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221111151 (or 221111136 counting only the distinct ones).

The product of its digits is 29030400, while the sum is 61.

The spelling of 138194456875 in words is "one hundred thirty-eight billion, one hundred ninety-four million, four hundred fifty-six thousand, eight hundred seventy-five".