137811257789 has 4 divisors (see below), whose sum is σ = 139030826556. Its totient is φ = 136591689024.

The previous prime is 137811257723. The next prime is 137811257813. The reversal of 137811257789 is 987752118731.

It is a happy number.

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 812820100 + 136998437689 = 28510^2 + 370133^2 .

It is a cyclic number.

It is not a de Polignac number, because 137811257789 - 2⁸ = 137811257533 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 (137811257189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 609784214 + ... + 609784439.

It is an arithmetic number, because the mean of its divisors is an integer number (34757706639).

Almost surely, 2^137811257789 is an apocalyptic number.

It is an amenable number.

137811257789 is a deficient number, since it is larger than the sum of its proper divisors (1219568767).

137811257789 is a wasteful number, since it uses less digits than its factorization.

137811257789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1219568766.

The product of its digits is 5927040, while the sum is 59.

The spelling of 137811257789 in words is "one hundred thirty-seven billion, eight hundred eleven million, two hundred fifty-seven thousand, seven hundred eighty-nine".