261717424162312 has 16 divisors (see below), whose sum is σ = 491273406135360. Its totient is φ = 130711182526224.

The previous prime is 261717424162309. The next prime is 261717424162333. The reversal of 261717424162312 is 213261424717162.

It is a super-2 number, since 2×261717424162312² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18441186828 + ... + 18441201019.

It is an arithmetic number, because the mean of its divisors is an integer number (30704587883460).

Almost surely, 2^{261717424162312} is an apocalyptic number.

It is an amenable number.

261717424162312 is a deficient number, since it is larger than the sum of its proper divisors (229555981973048).

261717424162312 is a wasteful number, since it uses less digits than its factorization.

261717424162312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36882388740 (or 36882388736 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 49.

Adding to 261717424162312 its reverse (213261424717162), we get a palindrome (474978848879474).

The spelling of 261717424162312 in words is "two hundred sixty-one trillion, seven hundred seventeen billion, four hundred twenty-four million, one hundred sixty-two thousand, three hundred twelve".