13849316578 has 4 divisors (see below), whose sum is σ = 20773974870. Its totient is φ = 6924658288.

The previous prime is 13849316573. The next prime is 13849316603. The reversal of 13849316578 is 87561394831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87561394831 = 70181 ⋅1247651.

It can be written as a sum of positive squares in only one way, i.e., 12933830529 + 915486049 = 113727^2 + 30257^2 .

It is not an unprimeable number, because it can be changed into a prime (13849316573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3462329143 + ... + 3462329146.

Almost surely, 2^13849316578 is an apocalyptic number.

13849316578 is a deficient number, since it is larger than the sum of its proper divisors (6924658292).

13849316578 is an equidigital number, since it uses as much as digits as its factorization.

13849316578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6924658291.

The product of its digits is 4354560, while the sum is 55.

The spelling of 13849316578 in words is "thirteen billion, eight hundred forty-nine million, three hundred sixteen thousand, five hundred seventy-eight".