261196443 has 12 divisors (see below), whose sum is σ = 377732160. Its totient is φ = 173924016.

The previous prime is 261196427. The next prime is 261196447. The reversal of 261196443 is 344691162.

261196443 is a `hidden beast` number, since 2 + 6 + 1 + 1 + 9 + 644 + 3 = 666.

It is not a de Polignac number, because 261196443 - 2⁴ = 261196427 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 261196398 and 261196407.

It is not an unprimeable number, because it can be changed into a prime (261196447) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9048 + ... + 24581.

It is an arithmetic number, because the mean of its divisors is an integer number (31477680).

Almost surely, 2^261196443 is an apocalyptic number.

261196443 is a deficient number, since it is larger than the sum of its proper divisors (116535717).

261196443 is a wasteful number, since it uses less digits than its factorization.

261196443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34498 (or 34495 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 261196443 is about 16161.5730360630. The cubic root of 261196443 is about 639.2279451565.

The spelling of 261196443 in words is "two hundred sixty-one million, one hundred ninety-six thousand, four hundred forty-three".