1621344689206 has 48 divisors (see below), whose sum is σ = 2719479947184. Its totient is φ = 724290336000.

The previous prime is 1621344689201. The next prime is 1621344689207. The reversal of 1621344689206 is 6029864431261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621344689201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4800841 + ... + 5127451.

It is an arithmetic number, because the mean of its divisors is an integer number (56655832233).

Almost surely, 2^{1621344689206} is an apocalyptic number.

1621344689206 is a deficient number, since it is larger than the sum of its proper divisors (1098135257978).

1621344689206 is a wasteful number, since it uses less digits than its factorization.

1621344689206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326989 (or 326978 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 52.

The spelling of 1621344689206 in words is "one trillion, six hundred twenty-one billion, three hundred forty-four million, six hundred eighty-nine thousand, two hundred six".