1641621340801 has 16 divisors (see below), whose sum is σ = 1769085743488. Its totient is φ = 1514326752000.

The previous prime is 1641621340787. The next prime is 1641621340811. The reversal of 1641621340801 is 1080431261461.

It is a cyclic number.

It is not a de Polignac number, because 1641621340801 - 2²³ = 1641612952193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1641621340811) 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, 172597636 + ... + 172607146.

It is an arithmetic number, because the mean of its divisors is an integer number (110567858968).

Almost surely, 2^{1641621340801} is an apocalyptic number.

It is an amenable number.

1641621340801 is a deficient number, since it is larger than the sum of its proper divisors (127464402687).

1641621340801 is a wasteful number, since it uses less digits than its factorization.

1641621340801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17032.

The product of its (nonzero) digits is 27648, while the sum is 37.

The spelling of 1641621340801 in words is "one trillion, six hundred forty-one billion, six hundred twenty-one million, three hundred forty thousand, eight hundred one".