14278772817 has 12 divisors (see below), whose sum is σ = 20627667060. Its totient is φ = 9517902048.

The previous prime is 14278772813. The next prime is 14278772839. The reversal of 14278772817 is 71827787241.

It can be written as a sum of positive squares in 2 ways, for example, as 7596691281 + 6682081536 = 87159^2 + 81744^2 .

It is not a de Polignac number, because 14278772817 - 2² = 14278772813 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (14278772813) 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, 33342 + ... + 172247.

It is an arithmetic number, because the mean of its divisors is an integer number (1718972255).

Almost surely, 2^14278772817 is an apocalyptic number.

It is an amenable number.

14278772817 is a deficient number, since it is larger than the sum of its proper divisors (6348894243).

14278772817 is a wasteful number, since it uses less digits than its factorization.

14278772817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213312 (or 213309 counting only the distinct ones).

The product of its digits is 2458624, while the sum is 54.

The spelling of 14278772817 in words is "fourteen billion, two hundred seventy-eight million, seven hundred seventy-two thousand, eight hundred seventeen".