261066520006313 has 16 divisors (see below), whose sum is σ = 314099725779840. Its totient is φ = 211970416838400.

The previous prime is 261066520006283. The next prime is 261066520006339. The reversal of 261066520006313 is 313600025660162.

It is a cyclic number.

It is not a de Polignac number, because 261066520006313 - 2²⁸ = 261066251570857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (261066520006373) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107353358 + ... + 109758263.

It is an arithmetic number, because the mean of its divisors is an integer number (19631232861240).

Almost surely, 2^{261066520006313} is an apocalyptic number.

It is an amenable number.

261066520006313 is a deficient number, since it is larger than the sum of its proper divisors (53033205773527).

261066520006313 is a wasteful number, since it uses less digits than its factorization.

261066520006313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217120688.

The product of its (nonzero) digits is 233280, while the sum is 41.

Adding to 261066520006313 its reverse (313600025660162), we get a palindrome (574666545666475).

The spelling of 261066520006313 in words is "two hundred sixty-one trillion, sixty-six billion, five hundred twenty million, six thousand, three hundred thirteen".