85815045298509 has 16 divisors (see below), whose sum is σ = 116699038034112. Its totient is φ = 56080157321088.

The previous prime is 85815045298429. The next prime is 85815045298531. The reversal of 85815045298509 is 90589254051858.

It is not a de Polignac number, because 85815045298509 - 2²⁴ = 85815028521293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85815045298559) 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 15 ways as a sum of consecutive naturals, for example, 1201956702 + ... + 1202028095.

It is an arithmetic number, because the mean of its divisors is an integer number (7293689877132).

Almost surely, 2^{85815045298509} is an apocalyptic number.

It is an amenable number.

85815045298509 is a deficient number, since it is larger than the sum of its proper divisors (30883992735603).

85815045298509 is a wasteful number, since it uses less digits than its factorization.

85815045298509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2403985036.

The product of its (nonzero) digits is 207360000, while the sum is 69.

The spelling of 85815045298509 in words is "eighty-five trillion, eight hundred fifteen billion, forty-five million, two hundred ninety-eight thousand, five hundred nine".