79154580709 has 8 divisors (see below), whose sum is σ = 79389745560. Its totient is φ = 78919766016.

The previous prime is 79154580691. The next prime is 79154580731. The reversal of 79154580709 is 90708545197.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 12821032900 + 66333547809 = 113230^2 + 257553^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 79154580709 - 2⁵ = 79154580677 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 79154580709.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79154580749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 368757 + ... + 542485.

It is an arithmetic number, because the mean of its divisors is an integer number (9923718195).

Almost surely, 2^79154580709 is an apocalyptic number.

It is an amenable number.

79154580709 is a deficient number, since it is larger than the sum of its proper divisors (235164851).

79154580709 is a wasteful number, since it uses less digits than its factorization.

79154580709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175079.

The product of its (nonzero) digits is 3175200, while the sum is 55.

The spelling of 79154580709 in words is "seventy-nine billion, one hundred fifty-four million, five hundred eighty thousand, seven hundred nine".