85178382811 has 4 divisors (see below), whose sum is σ = 85197112000. Its totient is φ = 85159653624.

The previous prime is 85178382797. The next prime is 85178382859. The reversal of 85178382811 is 11828387158.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85178382811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85178382911) 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, 9357771 + ... + 9366868.

It is an arithmetic number, because the mean of its divisors is an integer number (21299278000).

Almost surely, 2^85178382811 is an apocalyptic number.

85178382811 is a deficient number, since it is larger than the sum of its proper divisors (18729189).

85178382811 is a wasteful number, since it uses less digits than its factorization.

85178382811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18729188.

The product of its digits is 860160, while the sum is 52.

The spelling of 85178382811 in words is "eighty-five billion, one hundred seventy-eight million, three hundred eighty-two thousand, eight hundred eleven".