9161601932861 has 8 divisors (see below), whose sum is σ = 10480252078464. Its totient is φ = 7845414254640.

The previous prime is 9161601932779. The next prime is 9161601932863. The reversal of 9161601932861 is 1682391061619.

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 9161601932861 - 2¹⁸ = 9161601670717 is a prime.

It is a super-2 number, since 2×9161601932861² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9161601932863) 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, 615608870 + ... + 615623751.

It is an arithmetic number, because the mean of its divisors is an integer number (1310031509808).

Almost surely, 2^{9161601932861} is an apocalyptic number.

It is an amenable number.

9161601932861 is a deficient number, since it is larger than the sum of its proper divisors (1318650145603).

9161601932861 is a wasteful number, since it uses less digits than its factorization.

9161601932861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1231233691.

The product of its (nonzero) digits is 839808, while the sum is 53.

The spelling of 9161601932861 in words is "nine trillion, one hundred sixty-one billion, six hundred one million, nine hundred thirty-two thousand, eight hundred sixty-one".