12778874471 has 4 divisors (see below), whose sum is σ = 13940590344. Its totient is φ = 11617158600.

The previous prime is 12778874443. The next prime is 12778874501. The reversal of 12778874471 is 17447887721.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12778874471 is a prime.

It is a super-3 number, since 3×12778874471³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12778874971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 580857920 + ... + 580857941.

It is an arithmetic number, because the mean of its divisors is an integer number (3485147586).

Almost surely, 2^12778874471 is an apocalyptic number.

12778874471 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12778874471 is a deficient number, since it is larger than the sum of its proper divisors (1161715873).

12778874471 is a wasteful number, since it uses less digits than its factorization.

12778874471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1161715872.

The product of its digits is 4917248, while the sum is 56.

The spelling of 12778874471 in words is "twelve billion, seven hundred seventy-eight million, eight hundred seventy-four thousand, four hundred seventy-one".