138135586278628 has 24 divisors (see below), whose sum is σ = 242437180265280. Its totient is φ = 68867899657440.

The previous prime is 138135586278601. The next prime is 138135586278629. The reversal of 138135586278628 is 826872685531831.

It is not an unprimeable number, because it can be changed into a prime (138135586278629) 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, 2912518 + ... + 16874653.

It is an arithmetic number, because the mean of its divisors is an integer number (10101549177720).

Almost surely, 2^{138135586278628} is an apocalyptic number.

It is an amenable number.

138135586278628 is a deficient number, since it is larger than the sum of its proper divisors (104301593986652).

138135586278628 is a wasteful number, since it uses less digits than its factorization.

138135586278628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19792227 (or 19792225 counting only the distinct ones).

The product of its digits is 928972800, while the sum is 73.

The spelling of 138135586278628 in words is "one hundred thirty-eight trillion, one hundred thirty-five billion, five hundred eighty-six million, two hundred seventy-eight thousand, six hundred twenty-eight".