138752758665545 has 8 divisors (see below), whose sum is σ = 168219839372424. Its totient is φ = 109857854283264.

The previous prime is 138752758665533. The next prime is 138752758665553. The reversal of 138752758665545 is 545566857257831.

It can be written as a sum of positive squares in 4 ways, for example, as 3120903825664 + 135631854839881 = 1766608^2 + 11646109^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138752758665545 - 2⁸ = 138752758665289 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143044080614 + ... + 143044081583.

It is an arithmetic number, because the mean of its divisors is an integer number (21027479921553).

Almost surely, 2^{138752758665545} is an apocalyptic number.

It is an amenable number.

138752758665545 is a deficient number, since it is larger than the sum of its proper divisors (29467080706879).

138752758665545 is an equidigital number, since it uses as much as digits as its factorization.

138752758665545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286088162299.

The product of its digits is 8467200000, while the sum is 77.

The spelling of 138752758665545 in words is "one hundred thirty-eight trillion, seven hundred fifty-two billion, seven hundred fifty-eight million, six hundred sixty-five thousand, five hundred forty-five".