1646065230561 has 12 divisors (see below), whose sum is σ = 2377915167888. Its totient is φ = 1097254332504.

The previous prime is 1646065230547. The next prime is 1646065230581. The reversal of 1646065230561 is 1650325606461.

1646065230561 is a `hidden beast` number, since 1 + 6 + 4 + 6 + 0 + 6 + 52 + 30 + 561 = 666.

It is not a de Polignac number, because 1646065230561 - 2⁶ = 1646065230497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1646065230581) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10122175 + ... + 10283508.

It is an arithmetic number, because the mean of its divisors is an integer number (198159597324).

Almost surely, 2^{1646065230561} is an apocalyptic number.

It is an amenable number.

1646065230561 is a deficient number, since it is larger than the sum of its proper divisors (731849937327).

1646065230561 is a wasteful number, since it uses less digits than its factorization.

1646065230561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20414652 (or 20414649 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 45.

The spelling of 1646065230561 in words is "one trillion, six hundred forty-six billion, sixty-five million, two hundred thirty thousand, five hundred sixty-one".