6845751989 has 2 divisors, whose sum is σ = 6845751990. Its totient is φ = 6845751988.

The previous prime is 6845751949. The next prime is 6845752013. The reversal of 6845751989 is 9891575486.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5920071364 + 925680625 = 76942^2 + 30425^2 .

It is a cyclic number.

It is not a de Polignac number, because 6845751989 - 2¹² = 6845747893 is a prime.

It is a super-2 number, since 2×6845751989² = 93728640589794912242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6845751949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3422875994 + 3422875995.

It is an arithmetic number, because the mean of its divisors is an integer number (3422875995).

Almost surely, 2^6845751989 is an apocalyptic number.

It is an amenable number.

6845751989 is a deficient number, since it is larger than the sum of its proper divisors (1).

6845751989 is an equidigital number, since it uses as much as digits as its factorization.

6845751989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21772800, while the sum is 62.

The square root of 6845751989 is about 82739.0596332832. The cubic root of 6845751989 is about 1898.7759418670.

The spelling of 6845751989 in words is "six billion, eight hundred forty-five million, seven hundred fifty-one thousand, nine hundred eighty-nine".