138865207228 has 24 divisors (see below), whose sum is σ = 265184769024. Its totient is φ = 63101866800.

The previous prime is 138865207181. The next prime is 138865207237. The reversal of 138865207228 is 822702568831.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 316150 + ... + 614557.

It is an arithmetic number, because the mean of its divisors is an integer number (11049365376).

Almost surely, 2^138865207228 is an apocalyptic number.

It is an amenable number.

138865207228 is a deficient number, since it is larger than the sum of its proper divisors (126319561796).

138865207228 is a wasteful number, since it uses less digits than its factorization.

138865207228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934113 (or 934111 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 52.

The spelling of 138865207228 in words is "one hundred thirty-eight billion, eight hundred sixty-five million, two hundred seven thousand, two hundred twenty-eight".