1641904027749 has 32 divisors (see below), whose sum is σ = 2438410444800. Its totient is φ = 1091921543280.

The previous prime is 1641904027747. The next prime is 1641904027763. The reversal of 1641904027749 is 9477204091461.

1641904027749 is a `hidden beast` number, since 1 + 6 + 4 + 190 + 402 + 7 + 7 + 49 = 666.

It is not a de Polignac number, because 1641904027749 - 2¹ = 1641904027747 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1641904027695 and 1641904027704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641904027747) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 119744004 + ... + 119757714.

It is an arithmetic number, because the mean of its divisors is an integer number (76200326400).

Almost surely, 2^{1641904027749} is an apocalyptic number.

It is an amenable number.

1641904027749 is a deficient number, since it is larger than the sum of its proper divisors (796506417051).

1641904027749 is a wasteful number, since it uses less digits than its factorization.

1641904027749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24262 (or 24256 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 54.

The spelling of 1641904027749 in words is "one trillion, six hundred forty-one billion, nine hundred four million, twenty-seven thousand, seven hundred forty-nine".