261646225123324 has 24 divisors (see below), whose sum is σ = 459661197668400. Its totient is φ = 130315338218880.

The previous prime is 261646225123253. The next prime is 261646225123403. The reversal of 261646225123324 is 423321522646162.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109297554 + ... + 111665785.

It is an arithmetic number, because the mean of its divisors is an integer number (19152549902850).

Almost surely, 2^{261646225123324} is an apocalyptic number.

It is an amenable number.

261646225123324 is a deficient number, since it is larger than the sum of its proper divisors (198014972545076).

261646225123324 is a wasteful number, since it uses less digits than its factorization.

261646225123324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220964493 (or 220964491 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 49.

Adding to 261646225123324 its reverse (423321522646162), we get a palindrome (684967747769486).

The spelling of 261646225123324 in words is "two hundred sixty-one trillion, six hundred forty-six billion, two hundred twenty-five million, one hundred twenty-three thousand, three hundred twenty-four".