1641001641 has 16 divisors (see below), whose sum is σ = 2213928768. Its totient is φ = 1081080000.

The previous prime is 1641001591. The next prime is 1641001643. The reversal of 1641001641 is 1461001461.

It is not a de Polignac number, because 1641001641 - 2⁶ = 1641001577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1641001643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 160791 + ... + 170691.

It is an arithmetic number, because the mean of its divisors is an integer number (138370548).

Almost surely, 2^1641001641 is an apocalyptic number.

It is an amenable number.

1641001641 is a deficient number, since it is larger than the sum of its proper divisors (572927127).

1641001641 is a wasteful number, since it uses less digits than its factorization.

1641001641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10552.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 1641001641 is about 40509.2784556822. The cubic root of 1641001641 is about 1179.5137422422.

It can be divided in two parts, 164100 and 1641, that multiplied together give a square (269288100 = 16410²).

The spelling of 1641001641 in words is "one billion, six hundred forty-one million, one thousand, six hundred forty-one".