85115987955 has 24 divisors (see below), whose sum is σ = 147541185792. Its totient is φ = 45393099264.

The previous prime is 85115987953. The next prime is 85115987969. The reversal of 85115987955 is 55978951158.

It is not a de Polignac number, because 85115987955 - 2¹ = 85115987953 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 85115987892 and 85115987901.

It is not an unprimeable number, because it can be changed into a prime (85115987953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1782147 + ... + 1829283.

It is an arithmetic number, because the mean of its divisors is an integer number (6147549408).

Almost surely, 2^85115987955 is an apocalyptic number.

85115987955 is a deficient number, since it is larger than the sum of its proper divisors (62425197837).

85115987955 is a wasteful number, since it uses less digits than its factorization.

85115987955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87275 (or 87272 counting only the distinct ones).

The product of its digits is 22680000, while the sum is 63.

The spelling of 85115987955 in words is "eighty-five billion, one hundred fifteen million, nine hundred eighty-seven thousand, nine hundred fifty-five".