9649735261 has 4 divisors (see below), whose sum is σ = 10069288992. Its totient is φ = 9230181532.

The previous prime is 9649735259. The next prime is 9649735289. The reversal of 9649735261 is 1625379469.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9649735261 - 2¹ = 9649735259 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9649735199 and 9649735208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9649738261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209776831 + ... + 209776876.

It is an arithmetic number, because the mean of its divisors is an integer number (2517322248).

Almost surely, 2^9649735261 is an apocalyptic number.

It is an amenable number.

9649735261 is a deficient number, since it is larger than the sum of its proper divisors (419553731).

9649735261 is a wasteful number, since it uses less digits than its factorization.

9649735261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419553730.

The product of its digits is 2449440, while the sum is 52.

The square root of 9649735261 is about 98233.0660266695. The cubic root of 9649735261 is about 2128.9810684110.

The spelling of 9649735261 in words is "nine billion, six hundred forty-nine million, seven hundred thirty-five thousand, two hundred sixty-one".