1621463446463 has 16 divisors (see below), whose sum is σ = 1854409829376. Its totient is φ = 1388844571680.

The previous prime is 1621463446457. The next prime is 1621463446507. The reversal of 1621463446463 is 3646443641261.

It is a cyclic number.

It is not a de Polignac number, because 1621463446463 - 2³⁰ = 1620389704639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621463446403) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 86834618 + ... + 86853288.

It is an arithmetic number, because the mean of its divisors is an integer number (115900614336).

Almost surely, 2^{1621463446463} is an apocalyptic number.

1621463446463 is a deficient number, since it is larger than the sum of its proper divisors (232946382913).

1621463446463 is a wasteful number, since it uses less digits than its factorization.

1621463446463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26774.

The product of its digits is 5971968, while the sum is 50.

The spelling of 1621463446463 in words is "one trillion, six hundred twenty-one billion, four hundred sixty-three million, four hundred forty-six thousand, four hundred sixty-three".