1643641041356 has 24 divisors (see below), whose sum is σ = 3001484553984. Its totient is φ = 786075290000.

The previous prime is 1643641041337. The next prime is 1643641041407. The reversal of 1643641041356 is 6531401463461.

It is a super-2 number, since 2×1643641041356² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6663971 + ... + 6906213.

It is an arithmetic number, because the mean of its divisors is an integer number (125061856416).

Almost surely, 2^{1643641041356} is an apocalyptic number.

It is an amenable number.

1643641041356 is a deficient number, since it is larger than the sum of its proper divisors (1357843512628).

1643641041356 is a wasteful number, since it uses less digits than its factorization.

1643641041356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316021 (or 316019 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 44.

The spelling of 1643641041356 in words is "one trillion, six hundred forty-three billion, six hundred forty-one million, forty-one thousand, three hundred fifty-six".