16802899777 has 2 divisors, whose sum is σ = 16802899778. Its totient is φ = 16802899776.

The previous prime is 16802899759. The next prime is 16802899901. The reversal of 16802899777 is 77799820861.

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., 13825997056 + 2976902721 = 117584^2 + 54561^2 .

It is a cyclic number.

It is not a de Polignac number, because 16802899777 - 2²³ = 16794511169 is a prime.

It is not a weakly prime, because it can be changed into another prime (16802899177) 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, 8401449888 + 8401449889.

It is an arithmetic number, because the mean of its divisors is an integer number (8401449889).

Almost surely, 2^16802899777 is an apocalyptic number.

It is an amenable number.

16802899777 is a deficient number, since it is larger than the sum of its proper divisors (1).

16802899777 is an equidigital number, since it uses as much as digits as its factorization.

16802899777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21337344, while the sum is 64.

The spelling of 16802899777 in words is "sixteen billion, eight hundred two million, eight hundred ninety-nine thousand, seven hundred seventy-seven".