2028266787457 has 8 divisors (see below), whose sum is σ = 2087840471976. Its totient is φ = 1969482158592.

The previous prime is 2028266787439. The next prime is 2028266787461. The reversal of 2028266787457 is 7547876628202.

It can be written as a sum of positive squares in 4 ways, for example, as 200360083456 + 1827906704001 = 447616^2 + 1352001^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2028266787457 - 2⁷ = 2028266787329 is a prime.

It is a super-2 number, since 2×2028266787457² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2028266787557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 197258698 + ... + 197268979.

It is an arithmetic number, because the mean of its divisors is an integer number (260980058997).

Almost surely, 2^{2028266787457} is an apocalyptic number.

It is an amenable number.

2028266787457 is a deficient number, since it is larger than the sum of its proper divisors (59573684519).

2028266787457 is an equidigital number, since it uses as much as digits as its factorization.

2028266787457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394527827.

The product of its (nonzero) digits is 126443520, while the sum is 64.

The spelling of 2028266787457 in words is "two trillion, twenty-eight billion, two hundred sixty-six million, seven hundred eighty-seven thousand, four hundred fifty-seven".