9778997225 has 24 divisors (see below), whose sum is σ = 12290760960. Its totient is φ = 7717057920.

The previous prime is 9778997219. The next prime is 9778997233. The reversal of 9778997225 is 5227998779.

It is a happy number.

It is not a de Polignac number, because 9778997225 - 2⁶ = 9778997161 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3520037 + ... + 3522813.

It is an arithmetic number, because the mean of its divisors is an integer number (512115040).

Almost surely, 2^9778997225 is an apocalyptic number.

It is an amenable number.

9778997225 is a deficient number, since it is larger than the sum of its proper divisors (2511763735).

9778997225 is a wasteful number, since it uses less digits than its factorization.

9778997225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4649 (or 4644 counting only the distinct ones).

The product of its digits is 40007520, while the sum is 65.

The square root of 9778997225 is about 98888.8124359879. The cubic root of 9778997225 is about 2138.4451121844.

The spelling of 9778997225 in words is "nine billion, seven hundred seventy-eight million, nine hundred ninety-seven thousand, two hundred twenty-five".