9699767658025 has 9 divisors (see below), whose sum is σ = 12027731205541. Its totient is φ = 7759801668640.

The previous prime is 9699767658011. The next prime is 9699767658083. The reversal of 9699767658025 is 5208567679969.

The square root of 9699767658025 is 3114445.

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 1443546981529 + 8256220676496 = 1201477^2 + 2873364^2 .

It is not a de Polignac number, because 9699767658025 - 2⁷ = 9699767657897 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 15260781 + ... + 15883669.

Almost surely, 2^{9699767658025} is an apocalyptic number.

9699767658025 is the 3114445-th square number.

9699767658025 is the 1557223-rd centered octagonal number.

It is an amenable number.

9699767658025 is a deficient number, since it is larger than the sum of its proper divisors (2327963547516).

9699767658025 is an frugal number, since it uses more digits than its factorization.

9699767658025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1245788 (or 622894 counting only the distinct ones).

The product of its (nonzero) digits is 3086294400, while the sum is 79.

The spelling of 9699767658025 in words is "nine trillion, six hundred ninety-nine billion, seven hundred sixty-seven million, six hundred fifty-eight thousand, twenty-five".