138556565263615 has 32 divisors (see below), whose sum is σ = 171313767161856. Its totient is φ = 107518971517440.

The previous prime is 138556565263579. The next prime is 138556565263621. The reversal of 138556565263615 is 516362565655831.

It is a de Polignac number, because none of the positive numbers 2^k-138556565263615 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21506622 + ... + 27196468.

It is an arithmetic number, because the mean of its divisors is an integer number (5353555223808).

Almost surely, 2^{138556565263615} is an apocalyptic number.

138556565263615 is a deficient number, since it is larger than the sum of its proper divisors (32757201898241).

138556565263615 is a wasteful number, since it uses less digits than its factorization.

138556565263615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5690679.

The product of its digits is 583200000, while the sum is 67.

The spelling of 138556565263615 in words is "one hundred thirty-eight trillion, five hundred fifty-six billion, five hundred sixty-five million, two hundred sixty-three thousand, six hundred fifteen".