16577543953 has 2 divisors, whose sum is σ = 16577543954. Its totient is φ = 16577543952.

The previous prime is 16577543951. The next prime is 16577544007. The reversal of 16577543953 is 35934577561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16365317329 + 212226624 = 127927^2 + 14568^2 .

It is a cyclic number.

It is not a de Polignac number, because 16577543953 - 2¹ = 16577543951 is a prime.

Together with 16577543951, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 16577543894 and 16577543903.

It is not a weakly prime, because it can be changed into another prime (16577543951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8288771976 + 8288771977.

It is an arithmetic number, because the mean of its divisors is an integer number (8288771977).

Almost surely, 2^16577543953 is an apocalyptic number.

It is an amenable number.

16577543953 is a deficient number, since it is larger than the sum of its proper divisors (1).

16577543953 is an equidigital number, since it uses as much as digits as its factorization.

16577543953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11907000, while the sum is 55.

The spelling of 16577543953 in words is "sixteen billion, five hundred seventy-seven million, five hundred forty-three thousand, nine hundred fifty-three".