138291840321 has 8 divisors (see below), whose sum is σ = 190747366080. Its totient is φ = 89015437392.

The previous prime is 138291840311. The next prime is 138291840341. The reversal of 138291840321 is 123048192831.

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

It is not a de Polignac number, because 138291840321 - 2⁹ = 138291839809 is a prime.

It is a super-2 number, since 2×138291840321² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (138291840301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 794780605 + ... + 794780778.

It is an arithmetic number, because the mean of its divisors is an integer number (23843420760).

Almost surely, 2^138291840321 is an apocalyptic number.

It is an amenable number.

138291840321 is a deficient number, since it is larger than the sum of its proper divisors (52455525759).

138291840321 is a wasteful number, since it uses less digits than its factorization.

138291840321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1589561415.

The product of its (nonzero) digits is 82944, while the sum is 42.

The spelling of 138291840321 in words is "one hundred thirty-eight billion, two hundred ninety-one million, eight hundred forty thousand, three hundred twenty-one".