16860990877 has 2 divisors, whose sum is σ = 16860990878. Its totient is φ = 16860990876.

The previous prime is 16860990869. The next prime is 16860990893. The reversal of 16860990877 is 77809906861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15732434041 + 1128556836 = 125429^2 + 33594^2 .

It is a cyclic number.

It is not a de Polignac number, because 16860990877 - 2³ = 16860990869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16860990827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8430495438 + 8430495439.

It is an arithmetic number, because the mean of its divisors is an integer number (8430495439).

Almost surely, 2^16860990877 is an apocalyptic number.

It is an amenable number.

16860990877 is a deficient number, since it is larger than the sum of its proper divisors (1).

16860990877 is an equidigital number, since it uses as much as digits as its factorization.

16860990877 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9144576, while the sum is 61.

The spelling of 16860990877 in words is "sixteen billion, eight hundred sixty million, nine hundred ninety thousand, eight hundred seventy-seven".