137021065613 has 4 divisors (see below), whose sum is σ = 137813095068. Its totient is φ = 136229036160.

The previous prime is 137021065567. The next prime is 137021065639. The reversal of 137021065613 is 316560120731.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 125374770889 + 11646294724 = 354083^2 + 107918^2 .

It is a cyclic number.

It is not a de Polignac number, because 137021065613 - 2⁶ = 137021065549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137021065913) 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, 396014468 + ... + 396014813.

It is an arithmetic number, because the mean of its divisors is an integer number (34453273767).

Almost surely, 2^137021065613 is an apocalyptic number.

It is an amenable number.

137021065613 is a deficient number, since it is larger than the sum of its proper divisors (792029455).

137021065613 is an equidigital number, since it uses as much as digits as its factorization.

137021065613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 792029454.

The product of its (nonzero) digits is 22680, while the sum is 35.

The spelling of 137021065613 in words is "one hundred thirty-seven billion, twenty-one million, sixty-five thousand, six hundred thirteen".