261646061306122 has 8 divisors (see below), whose sum is σ = 392485105296900. Its totient is φ = 130817692873824.

The previous prime is 261646061306101. The next prime is 261646061306131. The reversal of 261646061306122 is 221603160646162.

It can be written as a sum of positive squares in 2 ways, for example, as 254950485874561 + 6695575431561 = 15967169^2 + 2587581^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×261646061306122² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2668828347 + ... + 2668926382.

Almost surely, 2^{261646061306122} is an apocalyptic number.

261646061306122 is a deficient number, since it is larger than the sum of its proper divisors (130839043990778).

261646061306122 is a wasteful number, since it uses less digits than its factorization.

261646061306122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5337779240.

The product of its (nonzero) digits is 746496, while the sum is 46.

The spelling of 261646061306122 in words is "two hundred sixty-one trillion, six hundred forty-six billion, sixty-one million, three hundred six thousand, one hundred twenty-two".