13278751218 has 24 divisors (see below), whose sum is σ = 28773907500. Its totient is φ = 4425745824.

The previous prime is 13278751169. The next prime is 13278751219. The reversal of 13278751218 is 81215787231.

It can be written as a sum of positive squares in 2 ways, for example, as 13278644289 + 106929 = 115233^2 + 327^2 .

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 11 ways as a sum of consecutive naturals, for example, 142008 + ... + 216156.

Almost surely, 2^13278751218 is an apocalyptic number.

13278751218 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

13278751218 is an abundant number, since it is smaller than the sum of its proper divisors (15495156282).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13278751218 is a wasteful number, since it uses less digits than its factorization.

13278751218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84106 (or 84103 counting only the distinct ones).

The product of its digits is 188160, while the sum is 45.

The spelling of 13278751218 in words is "thirteen billion, two hundred seventy-eight million, seven hundred fifty-one thousand, two hundred eighteen".