261145683 has 6 divisors (see below), whose sum is σ = 377210444. Its totient is φ = 174097116.

The previous prime is 261145673. The next prime is 261145691. The reversal of 261145683 is 386541162.

It is a happy number.

It is not a de Polignac number, because 261145683 - 2¹³ = 261137491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261145613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14508085 + ... + 14508102.

Almost surely, 2^261145683 is an apocalyptic number.

261145683 is a deficient number, since it is larger than the sum of its proper divisors (116064761).

261145683 is a wasteful number, since it uses less digits than its factorization.

261145683 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29016193 (or 29016190 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 261145683 is about 16160.0025680691. The cubic root of 261145683 is about 639.1865340354.

The spelling of 261145683 in words is "two hundred sixty-one million, one hundred forty-five thousand, six hundred eighty-three".