9651199725 has 72 divisors (see below), whose sum is σ = 17716008960. Its totient is φ = 5020152960.

The previous prime is 9651199721. The next prime is 9651199741. The reversal of 9651199725 is 5279911569.

It is not a de Polignac number, because 9651199725 - 2² = 9651199721 is a prime.

It is a super-2 number, since 2×9651199725² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9651199721) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3350836 + ... + 3353714.

It is an arithmetic number, because the mean of its divisors is an integer number (246055680).

Almost surely, 2^9651199725 is an apocalyptic number.

It is an amenable number.

9651199725 is a deficient number, since it is larger than the sum of its proper divisors (8064809235).

9651199725 is a wasteful number, since it uses less digits than its factorization.

9651199725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3259 (or 3251 counting only the distinct ones).

The product of its digits is 1530900, while the sum is 54.

The square root of 9651199725 is about 98240.5197716299. The cubic root of 9651199725 is about 2129.0887625027.

The spelling of 9651199725 in words is "nine billion, six hundred fifty-one million, one hundred ninety-nine thousand, seven hundred twenty-five".