138048378275 has 12 divisors (see below), whose sum is σ = 173524922712. Its totient is φ = 108925842240.

The previous prime is 138048378271. The next prime is 138048378277. The reversal of 138048378275 is 572873840831.

It is not a de Polignac number, because 138048378275 - 2² = 138048378271 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 138048378275.

It is not an unprimeable number, because it can be changed into a prime (138048378271) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37819649 + ... + 37823298.

It is an arithmetic number, because the mean of its divisors is an integer number (14460410226).

Almost surely, 2^138048378275 is an apocalyptic number.

138048378275 is a deficient number, since it is larger than the sum of its proper divisors (35476544437).

138048378275 is an equidigital number, since it uses as much as digits as its factorization.

138048378275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75643030 (or 75643025 counting only the distinct ones).

The product of its (nonzero) digits is 9031680, while the sum is 56.

The spelling of 138048378275 in words is "one hundred thirty-eight billion, forty-eight million, three hundred seventy-eight thousand, two hundred seventy-five".