6845751949 has 2 divisors, whose sum is σ = 6845751950. Its totient is φ = 6845751948.

The previous prime is 6845751923. The next prime is 6845751989. The reversal of 6845751949 is 9491575486.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6381133924 + 464618025 = 79882^2 + 21555^2 .

It is a cyclic number.

It is not a de Polignac number, because 6845751949 - 2²⁹ = 6308881037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6845751893 and 6845751902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6845751989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3422875974 + 3422875975.

It is an arithmetic number, because the mean of its divisors is an integer number (3422875975).

Almost surely, 2^6845751949 is an apocalyptic number.

It is an amenable number.

6845751949 is a deficient number, since it is larger than the sum of its proper divisors (1).

6845751949 is an equidigital number, since it uses as much as digits as its factorization.

6845751949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10886400, while the sum is 58.

The square root of 6845751949 is about 82739.0593915594. The cubic root of 6845751949 is about 1898.7759381688.

The spelling of 6845751949 in words is "six billion, eight hundred forty-five million, seven hundred fifty-one thousand, nine hundred forty-nine".