6745644457 has 2 divisors, whose sum is σ = 6745644458. Its totient is φ = 6745644456.

The previous prime is 6745644427. The next prime is 6745644481. The reversal of 6745644457 is 7544465476.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5755346496 + 990297961 = 75864^2 + 31469^2 .

It is a cyclic number.

It is not a de Polignac number, because 6745644457 - 2⁷ = 6745644329 is a prime.

It is not a weakly prime, because it can be changed into another prime (6745644407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3372822228 + 3372822229.

It is an arithmetic number, because the mean of its divisors is an integer number (3372822229).

Almost surely, 2^6745644457 is an apocalyptic number.

It is an amenable number.

6745644457 is a deficient number, since it is larger than the sum of its proper divisors (1).

6745644457 is an equidigital number, since it uses as much as digits as its factorization.

6745644457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11289600, while the sum is 52.

The square root of 6745644457 is about 82131.8723578125. The cubic root of 6745644457 is about 1889.4749955044.

The spelling of 6745644457 in words is "six billion, seven hundred forty-five million, six hundred forty-four thousand, four hundred fifty-seven".