85857858015 has 16 divisors (see below), whose sum is σ = 138294540000. Its totient is φ = 45483535232.

The previous prime is 85857858007. The next prime is 85857858049. The reversal of 85857858015 is 51085875858.

It is a cyclic number.

It is not a de Polignac number, because 85857858015 - 2³ = 85857858007 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85857858015.

It is a congruent 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, 19205340 + ... + 19209809.

It is an arithmetic number, because the mean of its divisors is an integer number (8643408750).

Almost surely, 2^85857858015 is an apocalyptic number.

85857858015 is a deficient number, since it is larger than the sum of its proper divisors (52436681985).

85857858015 is a wasteful number, since it uses less digits than its factorization.

85857858015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38415306.

The product of its (nonzero) digits is 17920000, while the sum is 60.

The spelling of 85857858015 in words is "eighty-five billion, eight hundred fifty-seven million, eight hundred fifty-eight thousand, fifteen".