75143257309 has 2 divisors, whose sum is σ = 75143257310. Its totient is φ = 75143257308.

The previous prime is 75143257307. The next prime is 75143257393. The reversal of 75143257309 is 90375234157.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68947206084 + 6196051225 = 262578^2 + 78715^2 .

It is a cyclic number.

It is not a de Polignac number, because 75143257309 - 2¹ = 75143257307 is a prime.

Together with 75143257307, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75143257303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37571628654 + 37571628655.

It is an arithmetic number, because the mean of its divisors is an integer number (37571628655).

Almost surely, 2^75143257309 is an apocalyptic number.

It is an amenable number.

75143257309 is a deficient number, since it is larger than the sum of its proper divisors (1).

75143257309 is an equidigital number, since it uses as much as digits as its factorization.

75143257309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 793800, while the sum is 46.

The spelling of 75143257309 in words is "seventy-five billion, one hundred forty-three million, two hundred fifty-seven thousand, three hundred nine".