115681356671789 has 2 divisors, whose sum is σ = 115681356671790. Its totient is φ = 115681356671788.

The previous prime is 115681356671779. The next prime is 115681356671857. The reversal of 115681356671789 is 987176653186511.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110604491495689 + 5076865176100 = 10516867^2 + 2253190^2 .

It is a cyclic number.

It is not a de Polignac number, because 115681356671789 - 2⁴ = 115681356671773 is a prime.

It is a super-2 number, since 2×115681356671789² (a number of 29 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115681356671779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57840678335894 + 57840678335895.

It is an arithmetic number, because the mean of its divisors is an integer number (57840678335895).

Almost surely, 2^{115681356671789} is an apocalyptic number.

It is an amenable number.

115681356671789 is a deficient number, since it is larger than the sum of its proper divisors (1).

115681356671789 is an equidigital number, since it uses as much as digits as its factorization.

115681356671789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 457228800, while the sum is 74.

The spelling of 115681356671789 in words is "one hundred fifteen trillion, six hundred eighty-one billion, three hundred fifty-six million, six hundred seventy-one thousand, seven hundred eighty-nine".