138624511274 has 4 divisors (see below), whose sum is σ = 207936766914. Its totient is φ = 69312255636.

The previous prime is 138624511261. The next prime is 138624511313. The reversal of 138624511274 is 472115426831.

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., 104086890625 + 34537620649 = 322625^2 + 185843^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34656127817 + ... + 34656127820.

Almost surely, 2^138624511274 is an apocalyptic number.

138624511274 is a deficient number, since it is larger than the sum of its proper divisors (69312255640).

138624511274 is an equidigital number, since it uses as much as digits as its factorization.

138624511274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69312255639.

The product of its digits is 322560, while the sum is 44.

The spelling of 138624511274 in words is "one hundred thirty-eight billion, six hundred twenty-four million, five hundred eleven thousand, two hundred seventy-four".