1305474026561 has 8 divisors (see below), whose sum is σ = 1312630802304. Its totient is φ = 1298333352960.

The previous prime is 1305474026557. The next prime is 1305474026579. The reversal of 1305474026561 is 1656204745031.

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 1305474026561 - 2² = 1305474026557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1305474026531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3862925 + ... + 4187258.

It is an arithmetic number, because the mean of its divisors is an integer number (164078850288).

Almost surely, 2^{1305474026561} is an apocalyptic number.

It is an amenable number.

1305474026561 is a deficient number, since it is larger than the sum of its proper divisors (7156775743).

1305474026561 is an equidigital number, since it uses as much as digits as its factorization.

1305474026561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8051071.

The product of its (nonzero) digits is 604800, while the sum is 44.

The spelling of 1305474026561 in words is "one trillion, three hundred five billion, four hundred seventy-four million, twenty-six thousand, five hundred sixty-one".