79159510609 has 3 divisors (see below), whose sum is σ = 79159791963. Its totient is φ = 79159229256.

The previous prime is 79159510601. The next prime is 79159510657. The reversal of 79159510609 is 90601595197.

The square root of 79159510609 is 281353.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 30173427025 + 48986083584 = 173705^2 + 221328^2 .

It is not a de Polignac number, because 79159510609 - 2³ = 79159510601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79159510601) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 140677 + ... + 422029.

It is an arithmetic number, because the mean of its divisors is an integer number (26386597321).

Almost surely, 2^79159510609 is an apocalyptic number.

79159510609 is the 281353-rd square number.

79159510609 is the 140677-th centered octagonal number.

It is an amenable number.

79159510609 is a deficient number, since it is larger than the sum of its proper divisors (281354).

79159510609 is an frugal number, since it uses more digits than its factorization.

79159510609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562706 (or 281353 counting only the distinct ones).

The product of its (nonzero) digits is 765450, while the sum is 52.

The spelling of 79159510609 in words is "seventy-nine billion, one hundred fifty-nine million, five hundred ten thousand, six hundred nine".