1621064660213 has 8 divisors (see below), whose sum is σ = 1648641276000. Its totient is φ = 1593491409328.

The previous prime is 1621064660161. The next prime is 1621064660269. The reversal of 1621064660213 is 3120664601261.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1621064660213 - 2¹⁴ = 1621064643829 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 (1621064860213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140138 + ... + 1806036.

It is an arithmetic number, because the mean of its divisors is an integer number (206080159500).

Almost surely, 2^{1621064660213} is an apocalyptic number.

It is an amenable number.

1621064660213 is a deficient number, since it is larger than the sum of its proper divisors (27576615787).

1621064660213 is a wasteful number, since it uses less digits than its factorization.

1621064660213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1682451.

The product of its (nonzero) digits is 62208, while the sum is 38.

The spelling of 1621064660213 in words is "one trillion, six hundred twenty-one billion, sixty-four million, six hundred sixty thousand, two hundred thirteen".