196510948081261 has 32 divisors (see below), whose sum is σ = 231819385651200. Its totient is φ = 164809093176000.

The previous prime is 196510948081237. The next prime is 196510948081267. The reversal of 196510948081261 is 162180849015691.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-196510948081261 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 196510948081261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196510948081267) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 124988835 + ... + 126551296.

It is an arithmetic number, because the mean of its divisors is an integer number (7244355801600).

Almost surely, 2^{196510948081261} is an apocalyptic number.

196510948081261 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

196510948081261 is a deficient number, since it is larger than the sum of its proper divisors (35308437569939).

196510948081261 is a wasteful number, since it uses less digits than its factorization.

196510948081261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251540281.

The product of its (nonzero) digits is 7464960, while the sum is 61.

The spelling of 196510948081261 in words is "one hundred ninety-six trillion, five hundred ten billion, nine hundred forty-eight million, eighty-one thousand, two hundred sixty-one".