261478683 has 24 divisors (see below), whose sum is σ = 403603200. Its totient is φ = 162549504.

The previous prime is 261478681. The next prime is 261478687. The reversal of 261478683 is 386874162.

It is not a de Polignac number, because 261478683 - 2¹ = 261478681 is a prime.

It is a super-2 number, since 2×261478683² = 136742203326828978, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (261478681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8838 + ... + 24516.

It is an arithmetic number, because the mean of its divisors is an integer number (16816800).

Almost surely, 2^261478683 is an apocalyptic number.

261478683 is a deficient number, since it is larger than the sum of its proper divisors (142124517).

261478683 is a wasteful number, since it uses less digits than its factorization.

261478683 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15811 (or 15808 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 261478683 is about 16170.3025018087. The cubic root of 261478683 is about 639.4581049403.

The spelling of 261478683 in words is "two hundred sixty-one million, four hundred seventy-eight thousand, six hundred eighty-three".