75781315757 has 16 divisors (see below), whose sum is σ = 92068137600. Its totient is φ = 60927422400.

The previous prime is 75781315747. The next prime is 75781315759. The reversal of 75781315757 is 75751318757.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75781315757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75781315759) 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 in 15 ways as a sum of consecutive naturals, for example, 2807282 + ... + 2834147.

It is an arithmetic number, because the mean of its divisors is an integer number (5754258600).

Almost surely, 2^75781315757 is an apocalyptic number.

It is an amenable number.

75781315757 is a deficient number, since it is larger than the sum of its proper divisors (16286821843).

75781315757 is a wasteful number, since it uses less digits than its factorization.

75781315757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5641556.

The product of its digits is 7203000, while the sum is 56.

The spelling of 75781315757 in words is "seventy-five billion, seven hundred eighty-one million, three hundred fifteen thousand, seven hundred fifty-seven".