79278687297 has 12 divisors (see below), whose sum is σ = 114562274580. Its totient is φ = 52830020448.

The previous prime is 79278687227. The next prime is 79278687359.

79278687297 is a `hidden beast` number, since 7 + 9 + 278 + 68 + 7 + 297 = 666.

79278687297 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 9880161201 + 69398526096 = 99399^2 + 263436^2 .

It is not a de Polignac number, because 79278687297 - 2¹¹ = 79278685249 is a prime.

It is a super-2 number, since 2×79278687297² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (79278687227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1847422 + ... + 1889847.

It is an arithmetic number, because the mean of its divisors is an integer number (9546856215).

Almost surely, 2^79278687297 is an apocalyptic number.

It is an amenable number.

79278687297 is a deficient number, since it is larger than the sum of its proper divisors (35283587283).

79278687297 is a wasteful number, since it uses less digits than its factorization.

79278687297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3739632 (or 3739629 counting only the distinct ones).

The product of its digits is 298722816, while the sum is 72.

The spelling of 79278687297 in words is "seventy-nine billion, two hundred seventy-eight million, six hundred eighty-seven thousand, two hundred ninety-seven".