1641940449472 has 28 divisors (see below), whose sum is σ = 3263540870416. Its totient is φ = 819630938880.

The previous prime is 1641940449469. The next prime is 1641940449509. The reversal of 1641940449472 is 2749440491461.

It is a super-2 number, since 2×1641940449472² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20886804 + ... + 20965267.

Almost surely, 2^{1641940449472} is an apocalyptic number.

It is an amenable number.

1641940449472 is a deficient number, since it is larger than the sum of its proper divisors (1621600420944).

1641940449472 is an equidigital number, since it uses as much as digits as its factorization.

1641940449472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41852696 (or 41852686 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 55.

The spelling of 1641940449472 in words is "one trillion, six hundred forty-one billion, nine hundred forty million, four hundred forty-nine thousand, four hundred seventy-two".