1340545021999 has 4 divisors (see below), whose sum is σ = 1340590277680. Its totient is φ = 1340499766320.

The previous prime is 1340545021967. The next prime is 1340545022099. The reversal of 1340545021999 is 9991205450431.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1340545021999 - 2⁵ = 1340545021967 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 (1340540021999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22583379 + ... + 22642660.

It is an arithmetic number, because the mean of its divisors is an integer number (335147569420).

Almost surely, 2^{1340545021999} is an apocalyptic number.

1340545021999 is a deficient number, since it is larger than the sum of its proper divisors (45255681).

1340545021999 is an equidigital number, since it uses as much as digits as its factorization.

1340545021999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45255680.

The product of its (nonzero) digits is 1749600, while the sum is 52.

The spelling of 1340545021999 in words is "one trillion, three hundred forty billion, five hundred forty-five million, twenty-one thousand, nine hundred ninety-nine".