138686010425 has 6 divisors (see below), whose sum is σ = 171970652958. Its totient is φ = 110948808320.

The previous prime is 138686010391. The next prime is 138686010431. The reversal of 138686010425 is 524010686831.

It can be written as a sum of positive squares in 3 ways, for example, as 19548513856 + 119137496569 = 139816^2 + 345163^2 .

It is a de Polignac number, because none of the positive numbers 2^k-138686010425 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2773720184 + ... + 2773720233.

It is an arithmetic number, because the mean of its divisors is an integer number (28661775493).

Almost surely, 2^138686010425 is an apocalyptic number.

It is an amenable number.

138686010425 is a deficient number, since it is larger than the sum of its proper divisors (33284642533).

138686010425 is an equidigital number, since it uses as much as digits as its factorization.

138686010425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5547440427 (or 5547440422 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 44.

The spelling of 138686010425 in words is "one hundred thirty-eight billion, six hundred eighty-six million, ten thousand, four hundred twenty-five".