261304314669 has 12 divisors (see below), whose sum is σ = 377499969756. Its totient is φ = 174174997632.

The previous prime is 261304314637. The next prime is 261304314679. The reversal of 261304314669 is 966413403162.

261304314669 is a `hidden beast` number, since 26 + 1 + 304 + 314 + 6 + 6 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 253562602500 + 7741712169 = 503550^2 + 87987^2 .

It is not a de Polignac number, because 261304314669 - 2⁵ = 261304314637 is a prime.

It is a super-2 number, since 2×261304314669² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261304314679) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2263794 + ... + 2376419.

It is an arithmetic number, because the mean of its divisors is an integer number (31458330813).

Almost surely, 2^261304314669 is an apocalyptic number.

It is an amenable number.

261304314669 is a deficient number, since it is larger than the sum of its proper divisors (116195655087).

261304314669 is a wasteful number, since it uses less digits than its factorization.

261304314669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4646476 (or 4646473 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 45.

The spelling of 261304314669 in words is "two hundred sixty-one billion, three hundred four million, three hundred fourteen thousand, six hundred sixty-nine".