75787873819117 has 2 divisors, whose sum is σ = 75787873819118. Its totient is φ = 75787873819116.

The previous prime is 75787873819037. The next prime is 75787873819219. The reversal of 75787873819117 is 71191837878757.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60688789670601 + 15099084148516 = 7790301^2 + 3885754^2 .

It is a cyclic number.

It is not a de Polignac number, because 75787873819117 - 2⁷ = 75787873818989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75787873819817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37893936909558 + 37893936909559.

It is an arithmetic number, because the mean of its divisors is an integer number (37893936909559).

Almost surely, 2^{75787873819117} is an apocalyptic number.

It is an amenable number.

75787873819117 is a deficient number, since it is larger than the sum of its proper divisors (1).

75787873819117 is an equidigital number, since it uses as much as digits as its factorization.

75787873819117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161699840, while the sum is 79.

The spelling of 75787873819117 in words is "seventy-five trillion, seven hundred eighty-seven billion, eight hundred seventy-three million, eight hundred nineteen thousand, one hundred seventeen".