11645280563 has 6 divisors (see below), whose sum is σ = 13546550916. Its totient is φ = 9981669012.

The previous prime is 11645280529. The next prime is 11645280599. The reversal of 11645280563 is 36508254611.

11645280563 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11645280563 - 2⁶ = 11645280499 is a prime.

It is a super-2 number, since 2×11645280563² (a number of 21 digits) contains 22 as substring.

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 11645280563.

It is not an unprimeable number, because it can be changed into a prime (11645280523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 118829345 + ... + 118829442.

It is an arithmetic number, because the mean of its divisors is an integer number (2257758486).

Almost surely, 2^11645280563 is an apocalyptic number.

11645280563 is a deficient number, since it is larger than the sum of its proper divisors (1901270353).

11645280563 is an equidigital number, since it uses as much as digits as its factorization.

11645280563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237658801 (or 237658794 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 41.

The spelling of 11645280563 in words is "eleven billion, six hundred forty-five million, two hundred eighty thousand, five hundred sixty-three".