138174672106 has 4 divisors (see below), whose sum is σ = 207262008162. Its totient is φ = 69087336052.

The previous prime is 138174672091. The next prime is 138174672109. The reversal of 138174672106 is 601276471831.

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., 98276607081 + 39898065025 = 313491^2 + 199745^2 .

It is a super-2 number, since 2×138174672106² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (138174672109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34543668025 + ... + 34543668028.

Almost surely, 2^138174672106 is an apocalyptic number.

138174672106 is a deficient number, since it is larger than the sum of its proper divisors (69087336056).

138174672106 is an equidigital number, since it uses as much as digits as its factorization.

138174672106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69087336055.

The product of its (nonzero) digits is 338688, while the sum is 46.

The spelling of 138174672106 in words is "one hundred thirty-eight billion, one hundred seventy-four million, six hundred seventy-two thousand, one hundred six".