13981481478 has 12 divisors (see below), whose sum is σ = 30293209908. Its totient is φ = 4660493820.

The previous prime is 13981481473. The next prime is 13981481533. The reversal of 13981481478 is 87418418931.

13981481478 is a `hidden beast` number, since 1 + 3 + 98 + 1 + 4 + 81 + 478 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13981481473) 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, 388374468 + ... + 388374503.

It is an arithmetic number, because the mean of its divisors is an integer number (2524434159).

Almost surely, 2^13981481478 is an apocalyptic number.

13981481478 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

13981481478 is an abundant number, since it is smaller than the sum of its proper divisors (16311728430).

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

13981481478 is a wasteful number, since it uses less digits than its factorization.

13981481478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776748979 (or 776748976 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 54.

The spelling of 13981481478 in words is "thirteen billion, nine hundred eighty-one million, four hundred eighty-one thousand, four hundred seventy-eight".