16812766280813 has 2 divisors, whose sum is σ = 16812766280814. Its totient is φ = 16812766280812.

The previous prime is 16812766280809. The next prime is 16812766280833. The reversal of 16812766280813 is 31808266721861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16545190786084 + 267575494729 = 4067578^2 + 517277^2 .

It is a cyclic number.

It is not a de Polignac number, because 16812766280813 - 2² = 16812766280809 is a prime.

It is a super-2 number, since 2×16812766280813² (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 (16812766280833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8406383140406 + 8406383140407.

It is an arithmetic number, because the mean of its divisors is an integer number (8406383140407).

Almost surely, 2^{16812766280813} is an apocalyptic number.

It is an amenable number.

16812766280813 is a deficient number, since it is larger than the sum of its proper divisors (1).

16812766280813 is an equidigital number, since it uses as much as digits as its factorization.

16812766280813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9289728, while the sum is 59.

The spelling of 16812766280813 in words is "sixteen trillion, eight hundred twelve billion, seven hundred sixty-six million, two hundred eighty thousand, eight hundred thirteen".