12900016249 has 4 divisors (see below), whose sum is σ = 13143412836. Its totient is φ = 12656619664.

The previous prime is 12900016243. The next prime is 12900016253. The reversal of 12900016249 is 94261000921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94261000921 = 173 ⋅544861277.

It can be written as a sum of positive squares in 2 ways, for example, as 9143184400 + 3756831849 = 95620^2 + 61293^2 .

It is a cyclic number.

It is not a de Polignac number, because 12900016249 - 2¹³ = 12900008057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12900016243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121698214 + ... + 121698319.

It is an arithmetic number, because the mean of its divisors is an integer number (3285853209).

Almost surely, 2^12900016249 is an apocalyptic number.

It is an amenable number.

12900016249 is a deficient number, since it is larger than the sum of its proper divisors (243396587).

12900016249 is an equidigital number, since it uses as much as digits as its factorization.

12900016249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243396586.

The product of its (nonzero) digits is 7776, while the sum is 34.

The spelling of 12900016249 in words is "twelve billion, nine hundred million, sixteen thousand, two hundred forty-nine".