138878952335 has 4 divisors (see below), whose sum is σ = 166654742808. Its totient is φ = 111103161864.

The previous prime is 138878952319. The next prime is 138878952341. The reversal of 138878952335 is 533259878831.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 138878952335 - 2⁴ = 138878952319 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 3 ways as a sum of consecutive naturals, for example, 13887895229 + ... + 13887895238.

It is an arithmetic number, because the mean of its divisors is an integer number (41663685702).

Almost surely, 2^138878952335 is an apocalyptic number.

138878952335 is a deficient number, since it is larger than the sum of its proper divisors (27775790473).

138878952335 is an equidigital number, since it uses as much as digits as its factorization.

138878952335 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27775790472.

The product of its digits is 43545600, while the sum is 62.

The spelling of 138878952335 in words is "one hundred thirty-eight billion, eight hundred seventy-eight million, nine hundred fifty-two thousand, three hundred thirty-five".