138278825371 has 4 divisors (see below), whose sum is σ = 138301385544. Its totient is φ = 138256265200.

The previous prime is 138278825369. The next prime is 138278825413. The reversal of 138278825371 is 173528872831.

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 138278825371 - 2¹ = 138278825369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138278822371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11270890 + ... + 11283151.

It is an arithmetic number, because the mean of its divisors is an integer number (34575346386).

Almost surely, 2^138278825371 is an apocalyptic number.

138278825371 is a deficient number, since it is larger than the sum of its proper divisors (22560173).

138278825371 is an equidigital number, since it uses as much as digits as its factorization.

138278825371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22560172.

The product of its digits is 4515840, while the sum is 55.

The spelling of 138278825371 in words is "one hundred thirty-eight billion, two hundred seventy-eight million, eight hundred twenty-five thousand, three hundred seventy-one".