1641986426566 has 32 divisors (see below), whose sum is σ = 2530257989760. Its totient is φ = 798909171456.

The previous prime is 1641986426513. The next prime is 1641986426609. The reversal of 1641986426566 is 6656246891461.

It is a super-2 number, since 2×1641986426566² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1641986426498 and 1641986426507.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4899105 + ... + 5223523.

It is an arithmetic number, because the mean of its divisors is an integer number (79070562180).

Almost surely, 2^{1641986426566} is an apocalyptic number.

1641986426566 is a deficient number, since it is larger than the sum of its proper divisors (888271563194).

1641986426566 is a wasteful number, since it uses less digits than its factorization.

1641986426566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324948.

The product of its digits is 89579520, while the sum is 64.

The spelling of 1641986426566 in words is "one trillion, six hundred forty-one billion, nine hundred eighty-six million, four hundred twenty-six thousand, five hundred sixty-six".