9865279261 has 8 divisors (see below), whose sum is σ = 9887533920. Its totient is φ = 9843050448.

The previous prime is 9865279223. The next prime is 9865279271. The reversal of 9865279261 is 1629725689.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9865279261 - 2¹⁹ = 9864754973 is a prime.

It is a super-2 number, since 2×9865279261² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9865279211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 893070 + ... + 904048.

It is an arithmetic number, because the mean of its divisors is an integer number (1235941740).

Almost surely, 2^9865279261 is an apocalyptic number.

It is an amenable number.

9865279261 is a deficient number, since it is larger than the sum of its proper divisors (22254659).

9865279261 is a wasteful number, since it uses less digits than its factorization.

9865279261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12923.

The product of its digits is 3265920, while the sum is 55.

The square root of 9865279261 is about 99324.1121832962. The cubic root of 9865279261 is about 2144.7160137905.

The spelling of 9865279261 in words is "nine billion, eight hundred sixty-five million, two hundred seventy-nine thousand, two hundred sixty-one".