86538078121265 has 12 divisors (see below), whose sum is σ = 103906086909852. Its totient is φ = 69190223775360.

The previous prime is 86538078121249. The next prime is 86538078121273. The reversal of 86538078121265 is 56212187083568.

It can be written as a sum of positive squares in 6 ways, for example, as 6028930230544 + 80509147890721 = 2455388^2 + 8972689^2 .

It is not a de Polignac number, because 86538078121265 - 2⁴ = 86538078121249 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 86538078121198 and 86538078121207.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11887439 + ... + 17730971.

It is an arithmetic number, because the mean of its divisors is an integer number (8658840575821).

Almost surely, 2^{86538078121265} is an apocalyptic number.

It is an amenable number.

86538078121265 is a deficient number, since it is larger than the sum of its proper divisors (17368008788587).

86538078121265 is an frugal number, since it uses more digits than its factorization.

86538078121265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5846980 (or 5845259 counting only the distinct ones).

The product of its (nonzero) digits is 38707200, while the sum is 62.

The spelling of 86538078121265 in words is "eighty-six trillion, five hundred thirty-eight billion, seventy-eight million, one hundred twenty-one thousand, two hundred sixty-five".