12651628544623 has 4 divisors (see below), whose sum is σ = 12689850987688. Its totient is φ = 12613406101560.

The previous prime is 12651628544587. The next prime is 12651628544629. The reversal of 12651628544623 is 32644582615621.

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

It is a cyclic number.

It is not a de Polignac number, because 12651628544623 - 2²⁹ = 12651091673711 is a prime.

It is a super-2 number, since 2×12651628544623² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12651628544629) 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, 19111221036 + ... + 19111221697.

It is an arithmetic number, because the mean of its divisors is an integer number (3172462746922).

Almost surely, 2^{12651628544623} is an apocalyptic number.

12651628544623 is a deficient number, since it is larger than the sum of its proper divisors (38222443065).

12651628544623 is an equidigital number, since it uses as much as digits as its factorization.

12651628544623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38222443064.

The product of its digits is 16588800, while the sum is 55.

The spelling of 12651628544623 in words is "twelve trillion, six hundred fifty-one billion, six hundred twenty-eight million, five hundred forty-four thousand, six hundred twenty-three".