1305605040023 has 2 divisors, whose sum is σ = 1305605040024. Its totient is φ = 1305605040022.

The previous prime is 1305605039989. The next prime is 1305605040037. The reversal of 1305605040023 is 3200405065031.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1305605040023 - 2³⁰ = 1304531298199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1305605040323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 652802520011 + 652802520012.

It is an arithmetic number, because the mean of its divisors is an integer number (652802520012).

Almost surely, 2^{1305605040023} is an apocalyptic number.

1305605040023 is a deficient number, since it is larger than the sum of its proper divisors (1).

1305605040023 is an equidigital number, since it uses as much as digits as its factorization.

1305605040023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 29.

The spelling of 1305605040023 in words is "one trillion, three hundred five billion, six hundred five million, forty thousand, twenty-three".