261604761487214 has 16 divisors (see below), whose sum is σ = 392931675150000. Its totient is φ = 130627648629504.

The previous prime is 261604761487213. The next prime is 261604761487229. The reversal of 261604761487214 is 412784167406162.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261604761487213) by changing a digit.

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, 23382749 + ... + 32710280.

It is an arithmetic number, because the mean of its divisors is an integer number (24558229696875).

Almost surely, 2^{261604761487214} is an apocalyptic number.

261604761487214 is a deficient number, since it is larger than the sum of its proper divisors (131326913662786).

261604761487214 is a wasteful number, since it uses less digits than its factorization.

261604761487214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56096147.

The product of its (nonzero) digits is 21676032, while the sum is 59.

The spelling of 261604761487214 in words is "two hundred sixty-one trillion, six hundred four billion, seven hundred sixty-one million, four hundred eighty-seven thousand, two hundred fourteen".