85069831457 has 8 divisors (see below), whose sum is σ = 91651982184. Its totient is φ = 78493154688.

The previous prime is 85069831433. The next prime is 85069831463. The reversal of 85069831457 is 75413896058.

It can be written as a sum of positive squares in 4 ways, for example, as 1474252816 + 83595578641 = 38396^2 + 289129^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 85069831457 - 2³⁶ = 16350354721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85069831757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1336178 + ... + 1398395.

It is an arithmetic number, because the mean of its divisors is an integer number (11456497773).

Almost surely, 2^85069831457 is an apocalyptic number.

It is an amenable number.

85069831457 is a deficient number, since it is larger than the sum of its proper divisors (6582150727).

85069831457 is a wasteful number, since it uses less digits than its factorization.

85069831457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2736979.

The product of its (nonzero) digits is 7257600, while the sum is 56.

The spelling of 85069831457 in words is "eighty-five billion, sixty-nine million, eight hundred thirty-one thousand, four hundred fifty-seven".