1390450659643 has 4 divisors (see below), whose sum is σ = 1424364090408. Its totient is φ = 1356537228880.

The previous prime is 1390450659599. The next prime is 1390450659713. The reversal of 1390450659643 is 3469560540931.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1390450659643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1390450659343) 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, 16956715321 + ... + 16956715402.

It is an arithmetic number, because the mean of its divisors is an integer number (356091022602).

Almost surely, 2^{1390450659643} is an apocalyptic number.

1390450659643 is a deficient number, since it is larger than the sum of its proper divisors (33913430765).

1390450659643 is an equidigital number, since it uses as much as digits as its factorization.

1390450659643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33913430764.

The product of its (nonzero) digits is 10497600, while the sum is 55.

The spelling of 1390450659643 in words is "one trillion, three hundred ninety billion, four hundred fifty million, six hundred fifty-nine thousand, six hundred forty-three".