139218070613 has 4 divisors (see below), whose sum is σ = 139218886380. Its totient is φ = 139217254848.

The previous prime is 139218070603. The next prime is 139218070637. The reversal of 139218070613 is 316070812931.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 59164724644 + 80053345969 = 243238^2 + 282937^2 .

It is a cyclic number.

It is not a de Polignac number, because 139218070613 - 2¹⁸ = 139217808469 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139218070603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43220 + ... + 529437.

It is an arithmetic number, because the mean of its divisors is an integer number (34804721595).

Almost surely, 2^139218070613 is an apocalyptic number.

It is an amenable number.

139218070613 is a deficient number, since it is larger than the sum of its proper divisors (815767).

139218070613 is an equidigital number, since it uses as much as digits as its factorization.

139218070613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815766.

The product of its (nonzero) digits is 54432, while the sum is 41.

The spelling of 139218070613 in words is "one hundred thirty-nine billion, two hundred eighteen million, seventy thousand, six hundred thirteen".