138728184682 has 4 divisors (see below), whose sum is σ = 208092277026. Its totient is φ = 69364092340.

The previous prime is 138728184659. The next prime is 138728184797. The reversal of 138728184682 is 286481827831.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 91531056681 + 47197128001 = 302541^2 + 217249^2 .

It is a super-2 number, since 2×138728184682² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34682046169 + ... + 34682046172.

Almost surely, 2^138728184682 is an apocalyptic number.

138728184682 is a deficient number, since it is larger than the sum of its proper divisors (69364092344).

138728184682 is an equidigital number, since it uses as much as digits as its factorization.

138728184682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69364092343.

The product of its digits is 8257536, while the sum is 58.

The spelling of 138728184682 in words is "one hundred thirty-eight billion, seven hundred twenty-eight million, one hundred eighty-four thousand, six hundred eighty-two".