137644229393 has 4 divisors (see below), whose sum is σ = 150157341168. Its totient is φ = 125131117620.

The previous prime is 137644229383. The next prime is 137644229441. The reversal of 137644229393 is 393922446731.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 137644229393 - 2¹² = 137644225297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137644229383) 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, 6256555871 + ... + 6256555892.

It is an arithmetic number, because the mean of its divisors is an integer number (37539335292).

Almost surely, 2^137644229393 is an apocalyptic number.

It is an amenable number.

137644229393 is a deficient number, since it is larger than the sum of its proper divisors (12513111775).

137644229393 is a wasteful number, since it uses less digits than its factorization.

137644229393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12513111774.

The product of its digits is 5878656, while the sum is 53.

The spelling of 137644229393 in words is "one hundred thirty-seven billion, six hundred forty-four million, two hundred twenty-nine thousand, three hundred ninety-three".