261604761487434 has 24 divisors (see below), whose sum is σ = 570420573355620. Its totient is φ = 86646163039488.

The previous prime is 261604761487429. The next prime is 261604761487463. The reversal of 261604761487434 is 434784167406162.

261604761487434 is a `hidden beast` number, since 2 + 6 + 1 + 6 + 0 + 4 + 7 + 614 + 8 + 7 + 4 + 3 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 248830906640625 + 12773854846809 = 15774375^2 + 3574053^2 .

It is a super-3 number, since 3×261604761487434³ (a number of 44 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46285340679 + ... + 46285346330.

Almost surely, 2^{261604761487434} is an apocalyptic number.

261604761487434 is an abundant number, since it is smaller than the sum of its proper divisors (308815811868186).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261604761487434 is a wasteful number, since it uses less digits than its factorization.

261604761487434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92570687174 (or 92570687171 counting only the distinct ones).

The product of its (nonzero) digits is 130056192, while the sum is 63.

The spelling of 261604761487434 in words is "two hundred sixty-one trillion, six hundred four billion, seven hundred sixty-one million, four hundred eighty-seven thousand, four hundred thirty-four".