1621364067606 has 32 divisors (see below), whose sum is σ = 3433532243328. Its totient is φ = 508655030400.

The previous prime is 1621364067553. The next prime is 1621364067683. The reversal of 1621364067606 is 6067604631261.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10619001 + ... + 10770603.

It is an arithmetic number, because the mean of its divisors is an integer number (107297882604).

Almost surely, 2^{1621364067606} is an apocalyptic number.

1621364067606 is an abundant number, since it is smaller than the sum of its proper divisors (1812168175722).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1621364067606 is a wasteful number, since it uses less digits than its factorization.

1621364067606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256476.

The product of its (nonzero) digits is 1306368, while the sum is 48.

Adding to 1621364067606 its reverse (6067604631261), we get a palindrome (7688968698867).

The spelling of 1621364067606 in words is "one trillion, six hundred twenty-one billion, three hundred sixty-four million, sixty-seven thousand, six hundred six".