261063128 has 16 divisors (see below), whose sum is σ = 493017000. Its totient is φ = 129591936.

The previous prime is 261063091. The next prime is 261063139. The reversal of 261063128 is 821360162.

It is a super-2 number, since 2×261063128² = 136307913602288768, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 261063128.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116273 + ... + 118496.

Almost surely, 2^261063128 is an apocalyptic number.

It is an amenable number.

261063128 is a deficient number, since it is larger than the sum of its proper divisors (231953872).

261063128 is a wasteful number, since it uses less digits than its factorization.

261063128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234914 (or 234910 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 261063128 is about 16157.4480658302. The cubic root of 261063128 is about 639.1191723937.

The spelling of 261063128 in words is "two hundred sixty-one million, sixty-three thousand, one hundred twenty-eight".