79986471089 has 6 divisors (see below), whose sum is σ = 93045486834. Its totient is φ = 68559832320.

The previous prime is 79986471077. The next prime is 79986471137. The reversal of 79986471089 is 98017468997.

It can be written as a sum of positive squares in only one way, i.e., 42541125025 + 37445346064 = 206255^2 + 193508^2 .

It is not a de Polignac number, because 79986471089 - 2¹⁶ = 79986405553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79986471589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 816188432 + ... + 816188529.

It is an arithmetic number, because the mean of its divisors is an integer number (15507581139).

Almost surely, 2^79986471089 is an apocalyptic number.

It is an amenable number.

79986471089 is a deficient number, since it is larger than the sum of its proper divisors (13059015745).

79986471089 is a wasteful number, since it uses less digits than its factorization.

79986471089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1632376975 (or 1632376968 counting only the distinct ones).

The product of its (nonzero) digits is 54867456, while the sum is 68.

The spelling of 79986471089 in words is "seventy-nine billion, nine hundred eighty-six million, four hundred seventy-one thousand, eighty-nine".