85165308461851 has 4 divisors (see below), whose sum is σ = 87242511107304. Its totient is φ = 83088105816400.

The previous prime is 85165308461813. The next prime is 85165308461867. The reversal of 85165308461851 is 15816480356158.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 85165308461851 - 2⁹ = 85165308461339 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85165308461851.

It is not an unprimeable number, because it can be changed into a prime (85165308461951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1038601322665 + ... + 1038601322746.

It is an arithmetic number, because the mean of its divisors is an integer number (21810627776826).

Almost surely, 2^{85165308461851} is an apocalyptic number.

85165308461851 is a deficient number, since it is larger than the sum of its proper divisors (2077202645453).

85165308461851 is a wasteful number, since it uses less digits than its factorization.

85165308461851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2077202645452.

The product of its (nonzero) digits is 27648000, while the sum is 61.

The spelling of 85165308461851 in words is "eighty-five trillion, one hundred sixty-five billion, three hundred eight million, four hundred sixty-one thousand, eight hundred fifty-one".