1787930008225 has 27 divisors (see below), whose sum is σ = 2355268045081. Its totient is φ = 1346120547200.

The previous prime is 1787930008211. The next prime is 1787930008253. The reversal of 1787930008225 is 5228000397871.

The square root of 1787930008225 is 1337135.

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

It can be written as a sum of positive squares in 4 ways, for example, as 41821477009 + 1746108531216 = 204503^2 + 1321404^2 .

It is not a de Polignac number, because 1787930008225 - 2²⁷ = 1787795790497 is a prime.

It is a super-2 number, since 2×1787930008225² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 26 ways as a sum of consecutive naturals, for example, 113648610 + ... + 113664340.

Almost surely, 2^{1787930008225} is an apocalyptic number.

1787930008225 is the 1337135-th square number.

1787930008225 is the 668568-th centered octagonal number.

It is an amenable number.

1787930008225 is a deficient number, since it is larger than the sum of its proper divisors (567338036856).

1787930008225 is an frugal number, since it uses more digits than its factorization.

1787930008225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31506 (or 15753 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 52.

The spelling of 1787930008225 in words is "one trillion, seven hundred eighty-seven billion, nine hundred thirty million, eight thousand, two hundred twenty-five".