75639342391 has 2 divisors, whose sum is σ = 75639342392. Its totient is φ = 75639342390.

The previous prime is 75639342329. The next prime is 75639342431. The reversal of 75639342391 is 19324393657.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (19324393657) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75639342391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75639343391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37819671195 + 37819671196.

It is an arithmetic number, because the mean of its divisors is an integer number (37819671196).

Almost surely, 2^75639342391 is an apocalyptic number.

75639342391 is a deficient number, since it is larger than the sum of its proper divisors (1).

75639342391 is an equidigital number, since it uses as much as digits as its factorization.

75639342391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3674160, while the sum is 52.

The spelling of 75639342391 in words is "seventy-five billion, six hundred thirty-nine million, three hundred forty-two thousand, three hundred ninety-one".