9961253109 has 24 divisors (see below), whose sum is σ = 14792873472. Its totient is φ = 6454568160.

The previous prime is 9961253077. The next prime is 9961253117. The reversal of 9961253109 is 9013521699.

It is a happy number.

9961253109 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9961253109 - 2⁵ = 9961253077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9961253119) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 312124 + ... + 342554.

It is an arithmetic number, because the mean of its divisors is an integer number (616369728).

Almost surely, 2^9961253109 is an apocalyptic number.

It is an amenable number.

9961253109 is a deficient number, since it is larger than the sum of its proper divisors (4831620363).

9961253109 is a wasteful number, since it uses less digits than its factorization.

9961253109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31457 (or 31454 counting only the distinct ones).

The product of its (nonzero) digits is 131220, while the sum is 45.

The square root of 9961253109 is about 99806.0775153497. The cubic root of 9961253109 is about 2151.6485001842.

The spelling of 9961253109 in words is "nine billion, nine hundred sixty-one million, two hundred fifty-three thousand, one hundred nine".