1305613120671 has 24 divisors (see below), whose sum is σ = 1905383068160. Its totient is φ = 861443444736.

The previous prime is 1305613120667. The next prime is 1305613120709. The reversal of 1305613120671 is 1760213165031.

1305613120671 is a `hidden beast` number, since 1 + 3 + 0 + 561 + 3 + 1 + 20 + 6 + 71 = 666.

It is not a de Polignac number, because 1305613120671 - 2² = 1305613120667 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 (1305613120661) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 928930 + ... + 1863903.

Almost surely, 2^{1305613120671} is an apocalyptic number.

1305613120671 is a deficient number, since it is larger than the sum of its proper divisors (599769947489).

1305613120671 is a wasteful number, since it uses less digits than its factorization.

1305613120671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2793375 (or 2793372 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The spelling of 1305613120671 in words is "one trillion, three hundred five billion, six hundred thirteen million, one hundred twenty thousand, six hundred seventy-one".