6378789761 has 2 divisors, whose sum is σ = 6378789762. Its totient is φ = 6378789760.

The previous prime is 6378789707. The next prime is 6378789817. The reversal of 6378789761 is 1679878736.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6376980736 + 1809025 = 79856^2 + 1345^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6378789761 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6378789694 and 6378789703.

It is not a weakly prime, because it can be changed into another prime (6378789961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3189394880 + 3189394881.

It is an arithmetic number, because the mean of its divisors is an integer number (3189394881).

Almost surely, 2^6378789761 is an apocalyptic number.

It is an amenable number.

6378789761 is a deficient number, since it is larger than the sum of its proper divisors (1).

6378789761 is an equidigital number, since it uses as much as digits as its factorization.

6378789761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21337344, while the sum is 62.

The square root of 6378789761 is about 79867.3259912963. The cubic root of 6378789761 is about 1854.5822383197.

The spelling of 6378789761 in words is "six billion, three hundred seventy-eight million, seven hundred eighty-nine thousand, seven hundred sixty-one".