261416416 has 12 divisors (see below), whose sum is σ = 514663632. Its totient is φ = 130708192.

The previous prime is 261416401. The next prime is 261416417. The reversal of 261416416 is 614614162.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261416417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4084600 + ... + 4084663.

It is an arithmetic number, because the mean of its divisors is an integer number (42888636).

Almost surely, 2^261416416 is an apocalyptic number.

It is an amenable number.

261416416 is a deficient number, since it is larger than the sum of its proper divisors (253247216).

261416416 is an equidigital number, since it uses as much as digits as its factorization.

261416416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8169273 (or 8169265 counting only the distinct ones).

The product of its digits is 6912, while the sum is 31.

The square root of 261416416 is about 16168.3770366725. The cubic root of 261416416 is about 639.4073419764.

The spelling of 261416416 in words is "two hundred sixty-one million, four hundred sixteen thousand, four hundred sixteen".