694963986025 has 27 divisors (see below), whose sum is σ = 868805331919. Its totient is φ = 551459502080.

The previous prime is 694963985993. The next prime is 694963986047. The reversal of 694963986025 is 520689369496.

It is a happy number.

The square root of 694963986025 is 833645.

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

It can be written as a sum of positive squares in 13 ways, for example, as 496479479769 + 198484506256 = 704613^2 + 445516^2 .

It is not a de Polignac number, because 694963986025 - 2⁵ = 694963985993 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, 571046217 + ... + 571047433.

Almost surely, 2^694963986025 is an apocalyptic number.

694963986025 is the 833645-th square number.

694963986025 is the 416823-rd centered octagonal number.

It is an amenable number.

694963986025 is a deficient number, since it is larger than the sum of its proper divisors (173841345894).

694963986025 is an frugal number, since it uses more digits than its factorization.

694963986025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2718 (or 1359 counting only the distinct ones).

The product of its (nonzero) digits is 151165440, while the sum is 67.

The spelling of 694963986025 in words is "six hundred ninety-four billion, nine hundred sixty-three million, nine hundred eighty-six thousand, twenty-five".