12543969061 has 24 divisors (see below), whose sum is σ = 14398192584. Its totient is φ = 10885754880.

The previous prime is 12543969049. The next prime is 12543969083. The reversal of 12543969061 is 16096934521.

It can be written as a sum of positive squares in 12 ways, for example, as 4351908961 + 8192060100 = 65969^2 + 90510^2 .

It is not a de Polignac number, because 12543969061 - 2⁷ = 12543968933 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 (12543969661) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3391165 + ... + 3394861.

It is an arithmetic number, because the mean of its divisors is an integer number (599924691).

Almost surely, 2^12543969061 is an apocalyptic number.

It is an amenable number.

12543969061 is a deficient number, since it is larger than the sum of its proper divisors (1854223523).

12543969061 is a wasteful number, since it uses less digits than its factorization.

12543969061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4921 (or 4908 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 46.

The spelling of 12543969061 in words is "twelve billion, five hundred forty-three million, nine hundred sixty-nine thousand, sixty-one".