12517381378 has 16 divisors (see below), whose sum is σ = 18858064896. Its totient is φ = 6231387040.

The previous prime is 12517381363. The next prime is 12517381381. The reversal of 12517381378 is 87318371521.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1104750 + ... + 1116022.

It is an arithmetic number, because the mean of its divisors is an integer number (1178629056).

Almost surely, 2^12517381378 is an apocalyptic number.

12517381378 is a deficient number, since it is larger than the sum of its proper divisors (6340683518).

12517381378 is a wasteful number, since it uses less digits than its factorization.

12517381378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13649.

The product of its digits is 282240, while the sum is 46.

The spelling of 12517381378 in words is "twelve billion, five hundred seventeen million, three hundred eighty-one thousand, three hundred seventy-eight".