1643608232407 has 4 divisors (see below), whose sum is σ = 1643644025320. Its totient is φ = 1643572439496.

The previous prime is 1643608232401. The next prime is 1643608232437. The reversal of 1643608232407 is 7042328063461.

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-1643608232407 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 (1643608232401) 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, 17827488 + ... + 17919445.

It is an arithmetic number, because the mean of its divisors is an integer number (410911006330).

Almost surely, 2^{1643608232407} is an apocalyptic number.

1643608232407 is a deficient number, since it is larger than the sum of its proper divisors (35792913).

1643608232407 is an equidigital number, since it uses as much as digits as its factorization.

1643608232407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35792912.

The product of its (nonzero) digits is 1161216, while the sum is 46.

The spelling of 1643608232407 in words is "one trillion, six hundred forty-three billion, six hundred eight million, two hundred thirty-two thousand, four hundred seven".