16641747553 has 2 divisors, whose sum is σ = 16641747554. Its totient is φ = 16641747552.

The previous prime is 16641747539. The next prime is 16641747583. The reversal of 16641747553 is 35574714661.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10879115809 + 5762631744 = 104303^2 + 75912^2 .

It is a cyclic number.

It is not a de Polignac number, because 16641747553 - 2⁹ = 16641747041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16641747497 and 16641747506.

It is not a weakly prime, because it can be changed into another prime (16641747523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8320873776 + 8320873777.

It is an arithmetic number, because the mean of its divisors is an integer number (8320873777).

Almost surely, 2^16641747553 is an apocalyptic number.

It is an amenable number.

16641747553 is a deficient number, since it is larger than the sum of its proper divisors (1).

16641747553 is an equidigital number, since it uses as much as digits as its factorization.

16641747553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2116800, while the sum is 49.

The spelling of 16641747553 in words is "sixteen billion, six hundred forty-one million, seven hundred forty-seven thousand, five hundred fifty-three".