6780438137 has 4 divisors (see below), whose sum is σ = 7396841616. Its totient is φ = 6164034660.

The previous prime is 6780438053. The next prime is 6780438139. The reversal of 6780438137 is 7318340876.

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 6780438137 - 2¹⁰ = 6780437113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6780438091 and 6780438100.

It is not an unprimeable number, because it can be changed into a prime (6780438139) 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, 308201723 + ... + 308201744.

It is an arithmetic number, because the mean of its divisors is an integer number (1849210404).

Almost surely, 2^6780438137 is an apocalyptic number.

It is an amenable number.

6780438137 is a deficient number, since it is larger than the sum of its proper divisors (616403479).

6780438137 is a wasteful number, since it uses less digits than its factorization.

6780438137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616403478.

The product of its (nonzero) digits is 677376, while the sum is 47.

The square root of 6780438137 is about 82343.4158691513. The cubic root of 6780438137 is about 1892.7180303578.

The spelling of 6780438137 in words is "six billion, seven hundred eighty million, four hundred thirty-eight thousand, one hundred thirty-seven".