138631809363 has 8 divisors (see below), whose sum is σ = 189350764176. Its totient is φ = 90167030400.

The previous prime is 138631809359. The next prime is 138631809427. The reversal of 138631809363 is 363908136831.

It is a happy number.

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

It is not a de Polignac number, because 138631809363 - 2² = 138631809359 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (138631809343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 563543818 + ... + 563544063.

It is an arithmetic number, because the mean of its divisors is an integer number (23668845522).

Almost surely, 2^138631809363 is an apocalyptic number.

138631809363 is a deficient number, since it is larger than the sum of its proper divisors (50718954813).

138631809363 is a wasteful number, since it uses less digits than its factorization.

138631809363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1127087925.

The product of its (nonzero) digits is 1679616, while the sum is 51.

The spelling of 138631809363 in words is "one hundred thirty-eight billion, six hundred thirty-one million, eight hundred nine thousand, three hundred sixty-three".