16623463453 has 2 divisors, whose sum is σ = 16623463454. Its totient is φ = 16623463452.

The previous prime is 16623463393. The next prime is 16623463459. The reversal of 16623463453 is 35436432661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12537952729 + 4085510724 = 111973^2 + 63918^2 .

It is a cyclic number.

It is not a de Polignac number, because 16623463453 - 2²¹ = 16621366301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16623463459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8311731726 + 8311731727.

It is an arithmetic number, because the mean of its divisors is an integer number (8311731727).

Almost surely, 2^16623463453 is an apocalyptic number.

It is an amenable number.

16623463453 is a deficient number, since it is larger than the sum of its proper divisors (1).

16623463453 is an equidigital number, since it uses as much as digits as its factorization.

16623463453 is an evil number, because the sum of its binary digits is even.

The product of its digits is 933120, while the sum is 43.

The spelling of 16623463453 in words is "sixteen billion, six hundred twenty-three million, four hundred sixty-three thousand, four hundred fifty-three".