79787278797 has 64 divisors (see below), whose sum is σ = 124403466240. Its totient is φ = 45144345600.

The previous prime is 79787278789. The next prime is 79787278799.

79787278797 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 79787278797 - 2³ = 79787278789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79787278799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1810608 + ... + 1854150.

It is an arithmetic number, because the mean of its divisors is an integer number (1943804160).

Almost surely, 2^79787278797 is an apocalyptic number.

It is an amenable number.

79787278797 is a deficient number, since it is larger than the sum of its proper divisors (44616187443).

79787278797 is a wasteful number, since it uses less digits than its factorization.

79787278797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43674.

The product of its digits is 1219784832, while the sum is 78.

The spelling of 79787278797 in words is "seventy-nine billion, seven hundred eighty-seven million, two hundred seventy-eight thousand, seven hundred ninety-seven".