9745999261 has 4 divisors (see below), whose sum is σ = 9748553724. Its totient is φ = 9743444800.

The previous prime is 9745999187. The next prime is 9745999267. The reversal of 9745999261 is 1629995479.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8972825625 + 773173636 = 94725^2 + 27806^2 .

It is a cyclic number.

It is not a de Polignac number, because 9745999261 - 2¹¹ = 9745997213 is a prime.

It is a super-2 number, since 2×9745999261² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9745999261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9745999267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1271500 + ... + 1279141.

It is an arithmetic number, because the mean of its divisors is an integer number (2437138431).

Almost surely, 2^9745999261 is an apocalyptic number.

It is an amenable number.

9745999261 is a deficient number, since it is larger than the sum of its proper divisors (2554463).

9745999261 is a wasteful number, since it uses less digits than its factorization.

9745999261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2554462.

The product of its digits is 11022480, while the sum is 61.

The square root of 9745999261 is about 98721.8276826356. The cubic root of 9745999261 is about 2136.0370992968.

The spelling of 9745999261 in words is "nine billion, seven hundred forty-five million, nine hundred ninety-nine thousand, two hundred sixty-one".