1305440513555 has 8 divisors (see below), whose sum is σ = 1566536598432. Its totient is φ = 1044347089408.

The previous prime is 1305440513551. The next prime is 1305440513563. The reversal of 1305440513555 is 5553150445031.

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 1305440513555 - 2² = 1305440513551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1305440513551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 650954 + ... + 1742016.

It is an arithmetic number, because the mean of its divisors is an integer number (195817074804).

Almost surely, 2^{1305440513555} is an apocalyptic number.

1305440513555 is a deficient number, since it is larger than the sum of its proper divisors (261096084877).

1305440513555 is a wasteful number, since it uses less digits than its factorization.

1305440513555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330365.

The product of its (nonzero) digits is 450000, while the sum is 41.

Adding to 1305440513555 its reverse (5553150445031), we get a palindrome (6858590958586).

The spelling of 1305440513555 in words is "one trillion, three hundred five billion, four hundred forty million, five hundred thirteen thousand, five hundred fifty-five".