12556763417645 has 8 divisors (see below), whose sum is σ = 15073561768704. Its totient is φ = 10041780289104.

The previous prime is 12556763417617. The next prime is 12556763417669. The reversal of 12556763417645 is 54671436765521.

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

It is a cyclic number.

It is not a de Polignac number, because 12556763417645 - 2⁸ = 12556763417389 is a prime.

It is a super-3 number, since 3×12556763417645³ (a number of 40 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 453790409 + ... + 453818078.

It is an arithmetic number, because the mean of its divisors is an integer number (1884195221088).

Almost surely, 2^{12556763417645} is an apocalyptic number.

It is an amenable number.

12556763417645 is a deficient number, since it is larger than the sum of its proper divisors (2516798351059).

12556763417645 is an equidigital number, since it uses as much as digits as its factorization.

12556763417645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 907611259.

The product of its digits is 127008000, while the sum is 62.

The spelling of 12556763417645 in words is "twelve trillion, five hundred fifty-six billion, seven hundred sixty-three million, four hundred seventeen thousand, six hundred forty-five".