85811257812523 has 32 divisors (see below), whose sum is σ = 89081793792000. Its totient is φ = 82562201715840.

The previous prime is 85811257812521. The next prime is 85811257812541. The reversal of 85811257812523 is 32521875211858.

It is not a de Polignac number, because 85811257812523 - 2¹ = 85811257812521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85811257812521) 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 31 ways as a sum of consecutive naturals, for example, 25854550258 + ... + 25854553576.

It is an arithmetic number, because the mean of its divisors is an integer number (2783806056000).

Almost surely, 2^{85811257812523} is an apocalyptic number.

85811257812523 is a deficient number, since it is larger than the sum of its proper divisors (3270535979477).

85811257812523 is a wasteful number, since it uses less digits than its factorization.

85811257812523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6315.

The product of its digits is 10752000, while the sum is 58.

The spelling of 85811257812523 in words is "eighty-five trillion, eight hundred eleven billion, two hundred fifty-seven million, eight hundred twelve thousand, five hundred twenty-three".