13278751209 has 6 divisors (see below), whose sum is σ = 19180418426. Its totient is φ = 8852500800.

The previous prime is 13278751169. The next prime is 13278751219. The reversal of 13278751209 is 90215787231.

It can be written as a sum of positive squares in only one way, i.e., 6768681984 + 6510069225 = 82272^2 + 80685^2 .

It is not a de Polignac number, because 13278751209 - 2⁷ = 13278751081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13278751219) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 737708392 + ... + 737708409.

Almost surely, 2^13278751209 is an apocalyptic number.

It is an amenable number.

13278751209 is a deficient number, since it is larger than the sum of its proper divisors (5901667217).

13278751209 is a wasteful number, since it uses less digits than its factorization.

13278751209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1475416807 (or 1475416804 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 45.

The spelling of 13278751209 in words is "thirteen billion, two hundred seventy-eight million, seven hundred fifty-one thousand, two hundred nine".