12633062561 has 4 divisors (see below), whose sum is σ = 14437785792. Its totient is φ = 10828339332.

The previous prime is 12633062549. The next prime is 12633062569. The reversal of 12633062561 is 16526033621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12633062561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12633062569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 902361605 + ... + 902361618.

It is an arithmetic number, because the mean of its divisors is an integer number (3609446448).

Almost surely, 2^12633062561 is an apocalyptic number.

It is an amenable number.

12633062561 is a deficient number, since it is larger than the sum of its proper divisors (1804723231).

12633062561 is an equidigital number, since it uses as much as digits as its factorization.

12633062561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1804723230.

The product of its (nonzero) digits is 38880, while the sum is 35.

The spelling of 12633062561 in words is "twelve billion, six hundred thirty-three million, sixty-two thousand, five hundred sixty-one".