12509998960549 has 8 divisors (see below), whose sum is σ = 13297421650968. Its totient is φ = 11728302981120.

The previous prime is 12509998960541. The next prime is 12509998960579. The reversal of 12509998960549 is 94506989990521.

12509998960549 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3308331729924 + 9201667230625 = 1818882^2 + 3033425^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12509998960549 - 2³ = 12509998960541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12509998960541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1431673242 + ... + 1431681979.

It is an arithmetic number, because the mean of its divisors is an integer number (1662177706371).

Almost surely, 2^{12509998960549} is an apocalyptic number.

It is an amenable number.

12509998960549 is a deficient number, since it is larger than the sum of its proper divisors (787422690419).

12509998960549 is a wasteful number, since it uses less digits than its factorization.

12509998960549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2863355495.

The product of its (nonzero) digits is 566870400, while the sum is 76.

The spelling of 12509998960549 in words is "twelve trillion, five hundred nine billion, nine hundred ninety-eight million, nine hundred sixty thousand, five hundred forty-nine".