85508811 has 16 divisors (see below), whose sum is σ = 129627520. Its totient is φ = 55679400.

The previous prime is 85508807. The next prime is 85508831. The reversal of 85508811 is 11880558.

It is not a de Polignac number, because 85508811 - 2² = 85508807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85508831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35665 + ... + 37986.

It is an arithmetic number, because the mean of its divisors is an integer number (8101720).

Almost surely, 2^85508811 is an apocalyptic number.

85508811 is a deficient number, since it is larger than the sum of its proper divisors (44118709).

85508811 is a wasteful number, since it uses less digits than its factorization.

85508811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73703 (or 73697 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 36.

The square root of 85508811 is about 9247.0974364932. The cubic root of 85508811 is about 440.5585382781.

The spelling of 85508811 in words is "eighty-five million, five hundred eight thousand, eight hundred eleven".