16989473077 has 2 divisors, whose sum is σ = 16989473078. Its totient is φ = 16989473076.

The previous prime is 16989473023. The next prime is 16989473093. The reversal of 16989473077 is 77037498961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11596920721 + 5392552356 = 107689^2 + 73434^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16989473077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16989473177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8494736538 + 8494736539.

It is an arithmetic number, because the mean of its divisors is an integer number (8494736539).

Almost surely, 2^16989473077 is an apocalyptic number.

It is an amenable number.

16989473077 is a deficient number, since it is larger than the sum of its proper divisors (1).

16989473077 is an equidigital number, since it uses as much as digits as its factorization.

16989473077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16003008, while the sum is 61.

The spelling of 16989473077 in words is "sixteen billion, nine hundred eighty-nine million, four hundred seventy-three thousand, seventy-seven".