12900075049 has 4 divisors (see below), whose sum is σ = 13248725764. Its totient is φ = 12551424336.

The previous prime is 12900074983. The next prime is 12900075091. The reversal of 12900075049 is 94057000921.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10371996649 + 2528078400 = 101843^2 + 50280^2 .

It is a cyclic number.

It is not a de Polignac number, because 12900075049 - 2¹⁷ = 12899943977 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 348650677 = 12900075049 / (1 + 2 + 9 + 0 + 0 + 0 + 7 + 5 + 0 + 4 + 9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12900074999 and 12900075017.

It is not an unprimeable number, because it can be changed into a prime (12900075449) 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, 174325302 + ... + 174325375.

It is an arithmetic number, because the mean of its divisors is an integer number (3312181441).

Almost surely, 2^12900075049 is an apocalyptic number.

It is an amenable number.

12900075049 is a deficient number, since it is larger than the sum of its proper divisors (348650715).

12900075049 is an equidigital number, since it uses as much as digits as its factorization.

12900075049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348650714.

The product of its (nonzero) digits is 22680, while the sum is 37.

The spelling of 12900075049 in words is "twelve billion, nine hundred million, seventy-five thousand, forty-nine".