16583306943977 has 2 divisors, whose sum is σ = 16583306943978. Its totient is φ = 16583306943976.

The previous prime is 16583306943923. The next prime is 16583306944051. The reversal of 16583306943977 is 77934960338561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13013414122921 + 3569892821056 = 3607411^2 + 1889416^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16583306943977 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16583306943977.

It is not a weakly prime, because it can be changed into another prime (16583306949977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8291653471988 + 8291653471989.

It is an arithmetic number, because the mean of its divisors is an integer number (8291653471989).

Almost surely, 2^{16583306943977} is an apocalyptic number.

It is an amenable number.

16583306943977 is a deficient number, since it is larger than the sum of its proper divisors (1).

16583306943977 is an equidigital number, since it uses as much as digits as its factorization.

16583306943977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 617258880, while the sum is 71.

The spelling of 16583306943977 in words is "sixteen trillion, five hundred eighty-three billion, three hundred six million, nine hundred forty-three thousand, nine hundred seventy-seven".