85011211057 has 4 divisors (see below), whose sum is σ = 85018189680. Its totient is φ = 85004232436.

The previous prime is 85011211049. The next prime is 85011211081. The reversal of 85011211057 is 75011211058.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 85011211057 - 2³ = 85011211049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85011211027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3471007 + ... + 3495412.

It is an arithmetic number, because the mean of its divisors is an integer number (21254547420).

Almost surely, 2^85011211057 is an apocalyptic number.

It is an amenable number.

85011211057 is a deficient number, since it is larger than the sum of its proper divisors (6978623).

85011211057 is a wasteful number, since it uses less digits than its factorization.

85011211057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6978622.

The product of its (nonzero) digits is 2800, while the sum is 31.

Subtracting from 85011211057 its reverse (75011211058), we obtain a palindrome (9999999999).

The spelling of 85011211057 in words is "eighty-five billion, eleven million, two hundred eleven thousand, fifty-seven".