79785606811 has 4 divisors (see below), whose sum is σ = 80909347824. Its totient is φ = 78661865800.

The previous prime is 79785606799. The next prime is 79785606829. The reversal of 79785606811 is 11860658797.

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

It is a cyclic number.

It is not a de Polignac number, because 79785606811 - 2³⁵ = 45425868443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79785606211) 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, 561870400 + ... + 561870541.

It is an arithmetic number, because the mean of its divisors is an integer number (20227336956).

Almost surely, 2^79785606811 is an apocalyptic number.

79785606811 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

79785606811 is the 126322-nd centered decagonal number.

79785606811 is a deficient number, since it is larger than the sum of its proper divisors (1123741013).

79785606811 is a wasteful number, since it uses less digits than its factorization.

79785606811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1123741012.

The product of its (nonzero) digits is 5080320, while the sum is 58.

The spelling of 79785606811 in words is "seventy-nine billion, seven hundred eighty-five million, six hundred six thousand, eight hundred eleven".