102805308563 has 4 divisors (see below), whose sum is σ = 104547771480. Its totient is φ = 101062845648.

The previous prime is 102805308553. The next prime is 102805308569. The reversal of 102805308563 is 365803508201.

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 102805308563 - 2⁶ = 102805308499 is a prime.

It is a super-2 number, since 2×102805308563² (a number of 23 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 102805308563.

It is not an unprimeable number, because it can be changed into a prime (102805308569) 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, 871231370 + ... + 871231487.

It is an arithmetic number, because the mean of its divisors is an integer number (26136942870).

Almost surely, 2^102805308563 is an apocalyptic number.

102805308563 is a deficient number, since it is larger than the sum of its proper divisors (1742462917).

102805308563 is an equidigital number, since it uses as much as digits as its factorization.

102805308563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1742462916.

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

The spelling of 102805308563 in words is "one hundred two billion, eight hundred five million, three hundred eight thousand, five hundred sixty-three".