1305604020653 has 16 divisors (see below), whose sum is σ = 1455208560000. Its totient is φ = 1164092954112.

The previous prime is 1305604020649. The next prime is 1305604020683. The reversal of 1305604020653 is 3560204065031.

It is a cyclic number.

It is not a de Polignac number, because 1305604020653 - 2² = 1305604020649 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1305604020683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17935073 + ... + 18007721.

It is an arithmetic number, because the mean of its divisors is an integer number (90950535000).

Almost surely, 2^{1305604020653} is an apocalyptic number.

It is an amenable number.

1305604020653 is a deficient number, since it is larger than the sum of its proper divisors (149604539347).

1305604020653 is a wasteful number, since it uses less digits than its factorization.

1305604020653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128324.

The product of its (nonzero) digits is 64800, while the sum is 35.

Adding to 1305604020653 its reverse (3560204065031), we get a palindrome (4865808085684).

The spelling of 1305604020653 in words is "one trillion, three hundred five billion, six hundred four million, twenty thousand, six hundred fifty-three".