9671819261 has 16 divisors (see below), whose sum is σ = 11342083200. Its totient is φ = 8166287808.

The previous prime is 9671819251. The next prime is 9671819317. The reversal of 9671819261 is 1629181769.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9671819261 is a prime.

It is a super-2 number, since 2×9671819261² (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 (9671819251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 667961 + ... + 682286.

It is an arithmetic number, because the mean of its divisors is an integer number (708880200).

Almost surely, 2^9671819261 is an apocalyptic number.

It is an amenable number.

9671819261 is a deficient number, since it is larger than the sum of its proper divisors (1670263939).

9671819261 is a wasteful number, since it uses less digits than its factorization.

9671819261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1350308.

The product of its digits is 326592, while the sum is 50.

The square root of 9671819261 is about 98345.4079304164. The cubic root of 9671819261 is about 2130.6039314756.

The spelling of 9671819261 in words is "nine billion, six hundred seventy-one million, eight hundred nineteen thousand, two hundred sixty-one".