79253818509 has 8 divisors (see below), whose sum is σ = 105746023552. Its totient is φ = 52798746240.

The previous prime is 79253818507. The next prime is 79253818519. The reversal of 79253818509 is 90581835297.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 79253818509 - 2¹ = 79253818507 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79253818507) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 9278212 + ... + 9286749.

It is an arithmetic number, because the mean of its divisors is an integer number (13218252944).

Almost surely, 2^79253818509 is an apocalyptic number.

It is an amenable number.

79253818509 is a deficient number, since it is larger than the sum of its proper divisors (26492205043).

79253818509 is a wasteful number, since it uses less digits than its factorization.

79253818509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18566387.

The product of its (nonzero) digits is 5443200, while the sum is 57.

The spelling of 79253818509 in words is "seventy-nine billion, two hundred fifty-three million, eight hundred eighteen thousand, five hundred nine".