1788256284049 has 27 divisors (see below), whose sum is σ = 1852432250907. Its totient is φ = 1726281108384.

The previous prime is 1788256284043. The next prime is 1788256284079. The reversal of 1788256284049 is 9404826528871.

The square root of 1788256284049 is 1337257.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1050430259025 + 737826025024 = 1024905^2 + 858968^2 .

It is not a de Polignac number, because 1788256284049 - 2⁹ = 1788256283537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1788256284043) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 7877780874 + ... + 7877781100.

Almost surely, 2^{1788256284049} is an apocalyptic number.

1788256284049 is the 1337257-th square number.

1788256284049 is the 668629-th centered octagonal number.

It is an amenable number.

1788256284049 is a deficient number, since it is larger than the sum of its proper divisors (64175966858).

1788256284049 is an frugal number, since it uses more digits than its factorization.

1788256284049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814 (or 407 counting only the distinct ones).

The product of its (nonzero) digits is 61931520, while the sum is 64.

Multiplying 1788256284049 by its sum of digits (64), we get a square (114448402179136 = 10698056²).

The spelling of 1788256284049 in words is "one trillion, seven hundred eighty-eight billion, two hundred fifty-six million, two hundred eighty-four thousand, forty-nine".