1646324115551 has 2 divisors, whose sum is σ = 1646324115552. Its totient is φ = 1646324115550.

The previous prime is 1646324115511. The next prime is 1646324115599. The reversal of 1646324115551 is 1555114236461.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1646324115551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1646324115511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 823162057775 + 823162057776.

It is an arithmetic number, because the mean of its divisors is an integer number (823162057776).

Almost surely, 2^{1646324115551} is an apocalyptic number.

1646324115551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1646324115551 is an equidigital number, since it uses as much as digits as its factorization.

1646324115551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432000, while the sum is 44.

The spelling of 1646324115551 in words is "one trillion, six hundred forty-six billion, three hundred twenty-four million, one hundred fifteen thousand, five hundred fifty-one".