1643245617352 has 32 divisors (see below), whose sum is σ = 3215409295680. Its totient is φ = 785811216960.

The previous prime is 1643245617319. The next prime is 1643245617353. The reversal of 1643245617352 is 2537165423461.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1643245617296 and 1643245617305.

It is not an unprimeable number, because it can be changed into a prime (1643245617353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1141402 + ... + 2142262.

It is an arithmetic number, because the mean of its divisors is an integer number (100481540490).

Almost surely, 2^{1643245617352} is an apocalyptic number.

It is an amenable number.

1643245617352 is a deficient number, since it is larger than the sum of its proper divisors (1572163678328).

1643245617352 is a wasteful number, since it uses less digits than its factorization.

1643245617352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009813 (or 1009809 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 49.

The spelling of 1643245617352 in words is "one trillion, six hundred forty-three billion, two hundred forty-five million, six hundred seventeen thousand, three hundred fifty-two".