138732140828 has 6 divisors (see below), whose sum is σ = 242781246456. Its totient is φ = 69366070412.

The previous prime is 138732140821. The next prime is 138732140887. The reversal of 138732140828 is 828041237831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138732140821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17341517600 + ... + 17341517607.

It is an arithmetic number, because the mean of its divisors is an integer number (40463541076).

Almost surely, 2^138732140828 is an apocalyptic number.

It is an amenable number.

138732140828 is a deficient number, since it is larger than the sum of its proper divisors (104049105628).

138732140828 is a wasteful number, since it uses less digits than its factorization.

138732140828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34683035211 (or 34683035209 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 47.

The spelling of 138732140828 in words is "one hundred thirty-eight billion, seven hundred thirty-two million, one hundred forty thousand, eight hundred twenty-eight".