138849483251 has 4 divisors (see below), whose sum is σ = 138850289904. Its totient is φ = 138848676600.

The previous prime is 138849483247. The next prime is 138849483281. The reversal of 138849483251 is 152384948831.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 138849483251 - 2² = 138849483247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138849483211) 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, 29855 + ... + 527816.

It is an arithmetic number, because the mean of its divisors is an integer number (34712572476).

Almost surely, 2^138849483251 is an apocalyptic number.

138849483251 is a deficient number, since it is larger than the sum of its proper divisors (806653).

138849483251 is an equidigital number, since it uses as much as digits as its factorization.

138849483251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 806652.

The product of its digits is 6635520, while the sum is 56.

The spelling of 138849483251 in words is "one hundred thirty-eight billion, eight hundred forty-nine million, four hundred eighty-three thousand, two hundred fifty-one".