1643463085 has 8 divisors (see below), whose sum is σ = 2151442656. Its totient is φ = 1195245840.

The previous prime is 1643463079. The next prime is 1643463179. The reversal of 1643463085 is 5803643461.

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

It is not a de Polignac number, because 1643463085 - 2⁷ = 1643462957 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14940519 + ... + 14940628.

It is an arithmetic number, because the mean of its divisors is an integer number (268930332).

Almost surely, 2^1643463085 is an apocalyptic number.

It is an amenable number.

1643463085 is a deficient number, since it is larger than the sum of its proper divisors (507979571).

1643463085 is a wasteful number, since it uses less digits than its factorization.

1643463085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29881163.

The product of its (nonzero) digits is 207360, while the sum is 40.

The square root of 1643463085 is about 40539.6483087853. The cubic root of 1643463085 is about 1180.1031904874.

The spelling of 1643463085 in words is "one billion, six hundred forty-three million, four hundred sixty-three thousand, eighty-five".