1305423065545 has 16 divisors (see below), whose sum is σ = 1568232929088. Its totient is φ = 1043188735680.

The previous prime is 1305423065521. The next prime is 1305423065627. The reversal of 1305423065545 is 5455603245031.

It is not a de Polignac number, because 1305423065545 - 2¹⁵ = 1305423032777 is a prime.

It is a super-2 number, since 2×1305423065545² (a number of 25 digits) contains 22 as substring.

It is a Duffinian 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, 25719082 + ... + 25769788.

It is an arithmetic number, because the mean of its divisors is an integer number (98014558068).

Almost surely, 2^{1305423065545} is an apocalyptic number.

It is an amenable number.

1305423065545 is a deficient number, since it is larger than the sum of its proper divisors (262809863543).

1305423065545 is a wasteful number, since it uses less digits than its factorization.

1305423065545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56280.

The product of its (nonzero) digits is 1080000, while the sum is 43.

The spelling of 1305423065545 in words is "one trillion, three hundred five billion, four hundred twenty-three million, sixty-five thousand, five hundred forty-five".