1621463446203 has 4 divisors (see below), whose sum is σ = 2161951261608. Its totient is φ = 1080975630800.

The previous prime is 1621463446139. The next prime is 1621463446243. The reversal of 1621463446203 is 3026443641261.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1621463446203 - 2⁶ = 1621463446139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1621463446243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 270243907698 + ... + 270243907703.

It is an arithmetic number, because the mean of its divisors is an integer number (540487815402).

Almost surely, 2^{1621463446203} is an apocalyptic number.

1621463446203 is a deficient number, since it is larger than the sum of its proper divisors (540487815405).

1621463446203 is an equidigital number, since it uses as much as digits as its factorization.

1621463446203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540487815404.

The product of its (nonzero) digits is 497664, while the sum is 42.

The spelling of 1621463446203 in words is "one trillion, six hundred twenty-one billion, four hundred sixty-three million, four hundred forty-six thousand, two hundred three".