79917567585 has 32 divisors (see below), whose sum is σ = 129433852800. Its totient is φ = 42103077888.

The previous prime is 79917567557. The next prime is 79917567623. The reversal of 79917567585 is 58576571997.

It is not a de Polignac number, because 79917567585 - 2¹¹ = 79917565537 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 488809 + ... + 631481.

It is an arithmetic number, because the mean of its divisors is an integer number (4044807900).

Almost surely, 2^79917567585 is an apocalyptic number.

It is an amenable number.

79917567585 is a deficient number, since it is larger than the sum of its proper divisors (49516285215).

79917567585 is a wasteful number, since it uses less digits than its factorization.

79917567585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143137.

The product of its digits is 166698000, while the sum is 69.

The spelling of 79917567585 in words is "seventy-nine billion, nine hundred seventeen million, five hundred sixty-seven thousand, five hundred eighty-five".