1641940449471 has 24 divisors (see below), whose sum is σ = 2711197261344. Its totient is φ = 938012011200.

The previous prime is 1641940449469. The next prime is 1641940449509. The reversal of 1641940449471 is 1749440491461.

1641940449471 is a `hidden beast` number, since 1 + 6 + 4 + 194 + 0 + 449 + 4 + 7 + 1 = 666.

It is not a de Polignac number, because 1641940449471 - 2¹ = 1641940449469 is a prime.

It is a super-3 number, since 3×1641940449471³ (a number of 38 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641940449431) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3080080 + ... + 3573621.

It is an arithmetic number, because the mean of its divisors is an integer number (112966552556).

Almost surely, 2^{1641940449471} is an apocalyptic number.

1641940449471 is a deficient number, since it is larger than the sum of its proper divisors (1069256811873).

1641940449471 is a wasteful number, since it uses less digits than its factorization.

1641940449471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6657631 (or 6657628 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The spelling of 1641940449471 in words is "one trillion, six hundred forty-one billion, nine hundred forty million, four hundred forty-nine thousand, four hundred seventy-one".