1646052144991 has 2 divisors, whose sum is σ = 1646052144992. Its totient is φ = 1646052144990.

The previous prime is 1646052144977. The next prime is 1646052145009. The reversal of 1646052144991 is 1994412506461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1646052144991 - 2³³ = 1637462210399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1646052184991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 823026072495 + 823026072496.

It is an arithmetic number, because the mean of its divisors is an integer number (823026072496).

Almost surely, 2^{1646052144991} is an apocalyptic number.

1646052144991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1646052144991 is an equidigital number, since it uses as much as digits as its factorization.

1646052144991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1866240, while the sum is 52.

The spelling of 1646052144991 in words is "one trillion, six hundred forty-six billion, fifty-two million, one hundred forty-four thousand, nine hundred ninety-one".