2028266787461 has 2 divisors, whose sum is σ = 2028266787462. Its totient is φ = 2028266787460.

The previous prime is 2028266787439. The next prime is 2028266787509. The reversal of 2028266787461 is 1647876628202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1719164146561 + 309102640900 = 1311169^2 + 555970^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2028266787461 is a prime.

It is a super-2 number, since 2×2028266787461² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2028266787461.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2028266787761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1014133393730 + 1014133393731.

It is an arithmetic number, because the mean of its divisors is an integer number (1014133393731).

Almost surely, 2^{2028266787461} is an apocalyptic number.

It is an amenable number.

2028266787461 is a deficient number, since it is larger than the sum of its proper divisors (1).

2028266787461 is an equidigital number, since it uses as much as digits as its factorization.

2028266787461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21676032, while the sum is 59.

The spelling of 2028266787461 in words is "two trillion, twenty-eight billion, two hundred sixty-six million, seven hundred eighty-seven thousand, four hundred sixty-one".