138796218028 has 12 divisors (see below), whose sum is σ = 261577487920. Its totient is φ = 64059792912.

The previous prime is 138796217993. The next prime is 138796218031. The reversal of 138796218028 is 820812697831.

It is a super-2 number, since 2×138796218028² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 138796218028.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1334578968 + ... + 1334579071.

Almost surely, 2^138796218028 is an apocalyptic number.

It is an amenable number.

138796218028 is a deficient number, since it is larger than the sum of its proper divisors (122781269892).

138796218028 is a wasteful number, since it uses less digits than its factorization.

138796218028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2669158056 (or 2669158054 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 55.

The spelling of 138796218028 in words is "one hundred thirty-eight billion, seven hundred ninety-six million, two hundred eighteen thousand, twenty-eight".