16277682660781 has 2 divisors, whose sum is σ = 16277682660782. Its totient is φ = 16277682660780.

The previous prime is 16277682660773. The next prime is 16277682660793. The reversal of 16277682660781 is 18706628677261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11118156672100 + 5159525988681 = 3334390^2 + 2271459^2 .

It is a cyclic number.

It is not a de Polignac number, because 16277682660781 - 2³ = 16277682660773 is a prime.

It is a super-2 number, since 2×16277682660781² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16277682610781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8138841330390 + 8138841330391.

It is an arithmetic number, because the mean of its divisors is an integer number (8138841330391).

Almost surely, 2^{16277682660781} is an apocalyptic number.

It is an amenable number.

16277682660781 is a deficient number, since it is larger than the sum of its proper divisors (1).

16277682660781 is an equidigital number, since it uses as much as digits as its factorization.

16277682660781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 113799168, while the sum is 67.

The spelling of 16277682660781 in words is "sixteen trillion, two hundred seventy-seven billion, six hundred eighty-two million, six hundred sixty thousand, seven hundred eighty-one".