85865512580321 has 32 divisors (see below), whose sum is σ = 90161983042560. Its totient is φ = 81666741671424.

The previous prime is 85865512580273. The next prime is 85865512580329. The reversal of 85865512580321 is 12308521556858.

It is a cyclic number.

It is not a de Polignac number, because 85865512580321 - 2³⁴ = 85848332711137 is a prime.

It is a super-3 number, since 3×85865512580321³ (a number of 43 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85865512580329) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3808954376 + ... + 3808976918.

It is an arithmetic number, because the mean of its divisors is an integer number (2817561970080).

Almost surely, 2^{85865512580321} is an apocalyptic number.

It is an amenable number.

85865512580321 is a deficient number, since it is larger than the sum of its proper divisors (4296470462239).

85865512580321 is a wasteful number, since it uses less digits than its factorization.

85865512580321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29345.

The product of its (nonzero) digits is 23040000, while the sum is 59.

The spelling of 85865512580321 in words is "eighty-five trillion, eight hundred sixty-five billion, five hundred twelve million, five hundred eighty thousand, three hundred twenty-one".