85015253505 has 64 divisors (see below), whose sum is σ = 177262622208. Its totient is φ = 33764290560.

The previous prime is 85015253503. The next prime is 85015253509. The reversal of 85015253505 is 50535251058.

It is a happy number.

It is not a de Polignac number, because 85015253505 - 2¹ = 85015253503 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (85015253503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1808626 + ... + 1855035.

It is an arithmetic number, because the mean of its divisors is an integer number (2769728472).

Almost surely, 2^85015253505 is an apocalyptic number.

85015253505 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

85015253505 is an abundant number, since it is smaller than the sum of its proper divisors (92247368703).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85015253505 is a wasteful number, since it uses less digits than its factorization.

85015253505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3663706.

The product of its (nonzero) digits is 150000, while the sum is 39.

The spelling of 85015253505 in words is "eighty-five billion, fifteen million, two hundred fifty-three thousand, five hundred five".