1641608689648 has 20 divisors (see below), whose sum is σ = 3180637698480. Its totient is φ = 820798961024.

The previous prime is 1641608689603. The next prime is 1641608689657. The reversal of 1641608689648 is 8469868061461.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3514893 + ... + 3954451.

It is an arithmetic number, because the mean of its divisors is an integer number (159031884924).

Almost surely, 2^{1641608689648} is an apocalyptic number.

It is an amenable number.

1641608689648 is a deficient number, since it is larger than the sum of its proper divisors (1539029008832).

1641608689648 is a wasteful number, since it uses less digits than its factorization.

1641608689648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672984 (or 672978 counting only the distinct ones).

The product of its (nonzero) digits is 95551488, while the sum is 67.

The spelling of 1641608689648 in words is "one trillion, six hundred forty-one billion, six hundred eight million, six hundred eighty-nine thousand, six hundred forty-eight".