1643590649163 has 8 divisors (see below), whose sum is σ = 2191473777808. Its totient is φ = 1095717309984.

The previous prime is 1643590649159. The next prime is 1643590649177. The reversal of 1643590649163 is 3619460953461.

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

It is not a de Polignac number, because 1643590649163 - 2² = 1643590649159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1643590649143) 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, 2046220 + ... + 2733897.

It is an arithmetic number, because the mean of its divisors is an integer number (273934222226).

Almost surely, 2^{1643590649163} is an apocalyptic number.

1643590649163 is a deficient number, since it is larger than the sum of its proper divisors (547883128645).

1643590649163 is a wasteful number, since it uses less digits than its factorization.

1643590649163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4894733.

The product of its (nonzero) digits is 12597120, while the sum is 57.

The spelling of 1643590649163 in words is "one trillion, six hundred forty-three billion, five hundred ninety million, six hundred forty-nine thousand, one hundred sixty-three".