139130440565 has 4 divisors (see below), whose sum is σ = 166956528684. Its totient is φ = 111304352448.

The previous prime is 139130440523. The next prime is 139130440577. The reversal of 139130440565 is 565044031931.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 565044031931 = 12637 ⋅44713463.

It can be written as a sum of positive squares in 2 ways, for example, as 97170605284 + 41959835281 = 311722^2 + 204841^2 .

It is a cyclic number.

It is not a de Polignac number, because 139130440565 - 2³⁶ = 70410963829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13913044052 + ... + 13913044061.

It is an arithmetic number, because the mean of its divisors is an integer number (41739132171).

Almost surely, 2^139130440565 is an apocalyptic number.

It is an amenable number.

139130440565 is a deficient number, since it is larger than the sum of its proper divisors (27826088119).

139130440565 is an equidigital number, since it uses as much as digits as its factorization.

139130440565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27826088118.

The product of its (nonzero) digits is 194400, while the sum is 41.

The spelling of 139130440565 in words is "one hundred thirty-nine billion, one hundred thirty million, four hundred forty thousand, five hundred sixty-five".