75958768649 has 2 divisors, whose sum is σ = 75958768650. Its totient is φ = 75958768648.

The previous prime is 75958768643. The next prime is 75958768681. The reversal of 75958768649 is 94686785957.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49833865225 + 26124903424 = 223235^2 + 161632^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75958768649 is a prime.

It is not a weakly prime, because it can be changed into another prime (75958768643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37979384324 + 37979384325.

It is an arithmetic number, because the mean of its divisors is an integer number (37979384325).

Almost surely, 2^75958768649 is an apocalyptic number.

It is an amenable number.

75958768649 is a deficient number, since it is larger than the sum of its proper divisors (1).

75958768649 is an equidigital number, since it uses as much as digits as its factorization.

75958768649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 914457600, while the sum is 74.

The spelling of 75958768649 in words is "seventy-five billion, nine hundred fifty-eight million, seven hundred sixty-eight thousand, six hundred forty-nine".