12615338146 has 4 divisors (see below), whose sum is σ = 18923007222. Its totient is φ = 6307669072.

The previous prime is 12615338107. The next prime is 12615338147. The reversal of 12615338146 is 64183351621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 8558285121 + 4057053025 = 92511^2 + 63695^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12615338099 and 12615338108.

It is not an unprimeable number, because it can be changed into a prime (12615338147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3153834535 + ... + 3153834538.

Almost surely, 2^12615338146 is an apocalyptic number.

12615338146 is a deficient number, since it is larger than the sum of its proper divisors (6307669076).

12615338146 is an equidigital number, since it uses as much as digits as its factorization.

12615338146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6307669075.

The product of its digits is 103680, while the sum is 40.

Adding to 12615338146 its reverse (64183351621), we get a palindrome (76798689767).

The spelling of 12615338146 in words is "twelve billion, six hundred fifteen million, three hundred thirty-eight thousand, one hundred forty-six".