12972996158 has 4 divisors (see below), whose sum is σ = 19459494240. Its totient is φ = 6486498078.

The previous prime is 12972996151. The next prime is 12972996167. The reversal of 12972996158 is 85169927921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 85169927921 = 13 ⋅6551532917.

It is a junction number, because it is equal to n+sod(n) for n = 12972996097 and 12972996106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12972996151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3243249038 + ... + 3243249041.

It is an arithmetic number, because the mean of its divisors is an integer number (4864873560).

Almost surely, 2^12972996158 is an apocalyptic number.

12972996158 is a deficient number, since it is larger than the sum of its proper divisors (6486498082).

12972996158 is an equidigital number, since it uses as much as digits as its factorization.

12972996158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6486498081.

The product of its digits is 4898880, while the sum is 59.

The spelling of 12972996158 in words is "twelve billion, nine hundred seventy-two million, nine hundred ninety-six thousand, one hundred fifty-eight".