1803125268025 has 27 divisors (see below), whose sum is σ = 2246423061519. Its totient is φ = 1435727106000.

The previous prime is 1803125267969. The next prime is 1803125268047. The reversal of 1803125268025 is 5208625213081.

The square root of 1803125268025 is 1342805.

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., 649125096489 + 1154000171536 = 805683^2 + 1074244^2 .

It is not a de Polignac number, because 1803125268025 - 2⁷ = 1803125267897 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1819500280 + ... + 1819501270.

Almost surely, 2^{1803125268025} is an apocalyptic number.

1803125268025 is the 1342805-th square number.

1803125268025 is the 671403-rd centered octagonal number.

It is an amenable number.

1803125268025 is a deficient number, since it is larger than the sum of its proper divisors (443297793494).

1803125268025 is an frugal number, since it uses more digits than its factorization.

1803125268025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2534 (or 1267 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 43.

The spelling of 1803125268025 in words is "one trillion, eight hundred three billion, one hundred twenty-five million, two hundred sixty-eight thousand, twenty-five".