75915481391 has 2 divisors, whose sum is σ = 75915481392. Its totient is φ = 75915481390.

The previous prime is 75915481381. The next prime is 75915481417. The reversal of 75915481391 is 19318451957.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75915481391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75915481381) 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, 37957740695 + 37957740696.

It is an arithmetic number, because the mean of its divisors is an integer number (37957740696).

Almost surely, 2^75915481391 is an apocalyptic number.

75915481391 is a deficient number, since it is larger than the sum of its proper divisors (1).

75915481391 is an equidigital number, since it uses as much as digits as its factorization.

75915481391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1360800, while the sum is 53.

The spelling of 75915481391 in words is "seventy-five billion, nine hundred fifteen million, four hundred eighty-one thousand, three hundred ninety-one".