9691418025 has 27 divisors (see below), whose sum is σ = 17361051799. Its totient is φ = 5167968720.

The previous prime is 9691418017. The next prime is 9691418039. The reversal of 9691418025 is 5208141969.

The square root of 9691418025 is 98445.

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., 3488910489 + 6202507536 = 59067^2 + 78756^2 .

It is not a de Polignac number, because 9691418025 - 2³ = 9691418017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Duffinian number.

It is a Curzon 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, 1473394 + ... + 1479956.

Almost surely, 2^9691418025 is an apocalyptic number.

9691418025 is the 98445-th square number.

9691418025 is the 49223-rd centered octagonal number.

It is an amenable number.

9691418025 is a deficient number, since it is larger than the sum of its proper divisors (7669633774).

9691418025 is an frugal number, since it uses more digits than its factorization.

9691418025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13142 (or 6571 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The cubic root of 9691418025 is about 2132.0420969650.

It can be divided in two parts, 9691 and 418025, that added together give a square (427716 = 654²).

The spelling of 9691418025 in words is "nine billion, six hundred ninety-one million, four hundred eighteen thousand, twenty-five".