16490814777 has 18 divisors (see below), whose sum is σ = 24613254666. Its totient is φ = 10639229760.

The previous prime is 16490814773. The next prime is 16490814841. The reversal of 16490814777 is 77741809461.

It is a happy number.

16490814777 is a `hidden beast` number, since 1 + 6 + 4 + 90 + 81 + 477 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12289052736 + 4201762041 = 110856^2 + 64821^2 .

It is not a de Polignac number, because 16490814777 - 2² = 16490814773 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16490814773) 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 in 17 ways as a sum of consecutive naturals, for example, 944688 + ... + 961985.

It is an arithmetic number, because the mean of its divisors is an integer number (1367403037).

Almost surely, 2^16490814777 is an apocalyptic number.

It is an amenable number.

16490814777 is a deficient number, since it is larger than the sum of its proper divisors (8122439889).

16490814777 is a wasteful number, since it uses less digits than its factorization.

16490814777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1906741 (or 1906707 counting only the distinct ones).

The product of its (nonzero) digits is 2370816, while the sum is 54.

The spelling of 16490814777 in words is "sixteen billion, four hundred ninety million, eight hundred fourteen thousand, seven hundred seventy-seven".