79287821130698 has 4 divisors (see below), whose sum is σ = 118931731696050. Its totient is φ = 39643910565348.

The previous prime is 79287821130697. The next prime is 79287821130731. The reversal of 79287821130698 is 89603112878297.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 62521392260209 + 16766428870489 = 7907047^2 + 4094683^2 .

It is not an unprimeable number, because it can be changed into a prime (79287821130691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19821955282673 + ... + 19821955282676.

Almost surely, 2^{79287821130698} is an apocalyptic number.

79287821130698 is a deficient number, since it is larger than the sum of its proper divisors (39643910565352).

79287821130698 is a wasteful number, since it uses less digits than its factorization.

79287821130698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39643910565351.

The product of its (nonzero) digits is 146313216, while the sum is 71.

The spelling of 79287821130698 in words is "seventy-nine trillion, two hundred eighty-seven billion, eight hundred twenty-one million, one hundred thirty thousand, six hundred ninety-eight".