1225645116563 has 8 divisors (see below), whose sum is σ = 1419925458528. Its totient is φ = 1036161820224.

The previous prime is 1225645116559. The next prime is 1225645116581. The reversal of 1225645116563 is 3656115465221.

It is a happy number.

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 1225645116563 - 2² = 1225645116559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1225615116563) 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 7 ways as a sum of consecutive naturals, for example, 1199260856 + ... + 1199261877.

It is an arithmetic number, because the mean of its divisors is an integer number (177490682316).

Almost surely, 2^{1225645116563} is an apocalyptic number.

1225645116563 is a deficient number, since it is larger than the sum of its proper divisors (194280341965).

1225645116563 is an equidigital number, since it uses as much as digits as its factorization.

1225645116563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2398522813.

The product of its digits is 1296000, while the sum is 47.

The spelling of 1225645116563 in words is "one trillion, two hundred twenty-five billion, six hundred forty-five million, one hundred sixteen thousand, five hundred sixty-three".