12561202263 has 16 divisors (see below), whose sum is σ = 17327974400. Its totient is φ = 8085515040.

The previous prime is 12561202259. The next prime is 12561202327. The reversal of 12561202263 is 36220216521.

It is not a de Polignac number, because 12561202263 - 2² = 12561202259 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12561202263.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12561202163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113008 + ... + 194661.

It is an arithmetic number, because the mean of its divisors is an integer number (1082998400).

Almost surely, 2^12561202263 is an apocalyptic number.

12561202263 is a deficient number, since it is larger than the sum of its proper divisors (4766772137).

12561202263 is a wasteful number, since it uses less digits than its factorization.

12561202263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308142.

The product of its (nonzero) digits is 8640, while the sum is 30.

Adding to 12561202263 its reverse (36220216521), we get a palindrome (48781418784).

The spelling of 12561202263 in words is "twelve billion, five hundred sixty-one million, two hundred two thousand, two hundred sixty-three".