85515013865 has 16 divisors (see below), whose sum is σ = 104159022336. Its totient is φ = 67386446400.

The previous prime is 85515013847. The next prime is 85515013873. The reversal of 85515013865 is 56831051558.

It is not a de Polignac number, because 85515013865 - 2¹⁴ = 85514997481 is a prime.

It is a super-2 number, since 2×85515013865² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 277820 + ... + 498210.

It is an arithmetic number, because the mean of its divisors is an integer number (6509938896).

Almost surely, 2^85515013865 is an apocalyptic number.

It is an amenable number.

85515013865 is a deficient number, since it is larger than the sum of its proper divisors (18644008471).

85515013865 is a wasteful number, since it uses less digits than its factorization.

85515013865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221560.

The product of its (nonzero) digits is 720000, while the sum is 47.

The spelling of 85515013865 in words is "eighty-five billion, five hundred fifteen million, thirteen thousand, eight hundred sixty-five".