1305434500566 has 32 divisors (see below), whose sum is σ = 2983890059520. Its totient is φ = 372976314336.

The previous prime is 1305434500507. The next prime is 1305434500583. The reversal of 1305434500566 is 6650054345031.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3974385 + ... + 4290291.

It is an arithmetic number, because the mean of its divisors is an integer number (93246564360).

Almost surely, 2^{1305434500566} is an apocalyptic number.

1305434500566 is an abundant number, since it is smaller than the sum of its proper divisors (1678455558954).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1305434500566 is a wasteful number, since it uses less digits than its factorization.

1305434500566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414308.

The product of its (nonzero) digits is 648000, while the sum is 42.

Adding to 1305434500566 its reverse (6650054345031), we get a palindrome (7955488845597).

The spelling of 1305434500566 in words is "one trillion, three hundred five billion, four hundred thirty-four million, five hundred thousand, five hundred sixty-six".