1645933490447 has 8 divisors (see below), whose sum is σ = 1691494253232. Its totient is φ = 1600429363200.

The previous prime is 1645933490431. The next prime is 1645933490473. The reversal of 1645933490447 is 7440943395461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1645933490447 - 2⁴ = 1645933490431 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 (1645933490477) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14099954 + ... + 14216207.

It is an arithmetic number, because the mean of its divisors is an integer number (211436781654).

Almost surely, 2^{1645933490447} is an apocalyptic number.

1645933490447 is a deficient number, since it is larger than the sum of its proper divisors (45560762785).

1645933490447 is a wasteful number, since it uses less digits than its factorization.

1645933490447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28317769.

The product of its (nonzero) digits is 39191040, while the sum is 59.

The spelling of 1645933490447 in words is "one trillion, six hundred forty-five billion, nine hundred thirty-three million, four hundred ninety thousand, four hundred forty-seven".