138750125026 has 4 divisors (see below), whose sum is σ = 208125187542. Its totient is φ = 69375062512.

The previous prime is 138750125009. The next prime is 138750125051. The reversal of 138750125026 is 620521057831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 620521057831 = 337691 ⋅1837541.

It can be written as a sum of positive squares in only one way, i.e., 136418683801 + 2331441225 = 369349^2 + 48285^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 138750125026.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34687531255 + ... + 34687531258.

Almost surely, 2^138750125026 is an apocalyptic number.

138750125026 is a deficient number, since it is larger than the sum of its proper divisors (69375062516).

138750125026 is an equidigital number, since it uses as much as digits as its factorization.

138750125026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69375062515.

The product of its (nonzero) digits is 100800, while the sum is 40.

The spelling of 138750125026 in words is "one hundred thirty-eight billion, seven hundred fifty million, one hundred twenty-five thousand, twenty-six".