85445371057 has 4 divisors (see below), whose sum is σ = 85445976420. Its totient is φ = 85444765696.

The previous prime is 85445371009. The next prime is 85445371091. The reversal of 85445371057 is 75017354458.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 75017354458 = 2 ⋅37508677229.

It can be written as a sum of positive squares in 2 ways, for example, as 76756148401 + 8689222656 = 277049^2 + 93216^2 .

It is a cyclic number.

It is not a de Polignac number, because 85445371057 - 2¹⁵ = 85445338289 is a prime.

It is a super-2 number, since 2×85445371057² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85445371057.

It is not an unprimeable number, because it can be changed into a prime (85445371757) 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 3 ways as a sum of consecutive naturals, for example, 33513 + ... + 414745.

It is an arithmetic number, because the mean of its divisors is an integer number (21361494105).

Almost surely, 2^85445371057 is an apocalyptic number.

It is an amenable number.

85445371057 is a deficient number, since it is larger than the sum of its proper divisors (605363).

85445371057 is a wasteful number, since it uses less digits than its factorization.

85445371057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605362.

The product of its (nonzero) digits is 2352000, while the sum is 49.

The spelling of 85445371057 in words is "eighty-five billion, four hundred forty-five million, three hundred seventy-one thousand, fifty-seven".