853820811 has 16 divisors (see below), whose sum is σ = 1270357920. Its totient is φ = 566766720.

The previous prime is 853820791. The next prime is 853820819. The reversal of 853820811 is 118028358.

It is not a de Polignac number, because 853820811 - 2¹⁰ = 853819787 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (853820819) 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, 61570 + ... + 74151.

It is an arithmetic number, because the mean of its divisors is an integer number (79397370).

Almost surely, 2^853820811 is an apocalyptic number.

853820811 is a deficient number, since it is larger than the sum of its proper divisors (416537109).

853820811 is a wasteful number, since it uses less digits than its factorization.

853820811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135963 (or 135957 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 36.

The square root of 853820811 is about 29220.2123708915. The cubic root of 853820811 is about 948.6854620287.

The spelling of 853820811 in words is "eight hundred fifty-three million, eight hundred twenty thousand, eight hundred eleven".