1623664011623 has 2 divisors, whose sum is σ = 1623664011624. Its totient is φ = 1623664011622.

The previous prime is 1623664011617. The next prime is 1623664011653. The reversal of 1623664011623 is 3261104663261.

It is a weak prime.

It is an emirp because it is prime and its reverse (3261104663261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1623664011623 - 2⁶ = 1623664011559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1623664011653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 811832005811 + 811832005812.

It is an arithmetic number, because the mean of its divisors is an integer number (811832005812).

Almost surely, 2^{1623664011623} is an apocalyptic number.

1623664011623 is a deficient number, since it is larger than the sum of its proper divisors (1).

1623664011623 is an equidigital number, since it uses as much as digits as its factorization.

1623664011623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 41.

Adding to 1623664011623 its reverse (3261104663261), we get a palindrome (4884768674884).

The spelling of 1623664011623 in words is "one trillion, six hundred twenty-three billion, six hundred sixty-four million, eleven thousand, six hundred twenty-three".