86725578769 has 2 divisors, whose sum is σ = 86725578770. Its totient is φ = 86725578768.

The previous prime is 86725578767. The next prime is 86725578787. The reversal of 86725578769 is 96787552768.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71278320400 + 15447258369 = 266980^2 + 124287^2 .

It is a cyclic number.

It is not a de Polignac number, because 86725578769 - 2¹ = 86725578767 is a prime.

It is a super-2 number, since 2×86725578769² (a number of 23 digits) contains 22 as substring.

Together with 86725578767, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 86725578698 and 86725578707.

It is not a weakly prime, because it can be changed into another prime (86725578767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43362789384 + 43362789385.

It is an arithmetic number, because the mean of its divisors is an integer number (43362789385).

Almost surely, 2^86725578769 is an apocalyptic number.

It is an amenable number.

86725578769 is a deficient number, since it is larger than the sum of its proper divisors (1).

86725578769 is an equidigital number, since it uses as much as digits as its factorization.

86725578769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 355622400, while the sum is 70.

The spelling of 86725578769 in words is "eighty-six billion, seven hundred twenty-five million, five hundred seventy-eight thousand, seven hundred sixty-nine".