261113416 has 8 divisors (see below), whose sum is σ = 489587670. Its totient is φ = 130556704.

The previous prime is 261113401. The next prime is 261113429. The reversal of 261113416 is 614311162.

It can be written as a sum of positive squares in only one way, i.e., 247936516 + 13176900 = 15746^2 + 3630^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16319581 + ... + 16319596.

Almost surely, 2^261113416 is an apocalyptic number.

It is an amenable number.

261113416 is a deficient number, since it is larger than the sum of its proper divisors (228474254).

261113416 is a wasteful number, since it uses less digits than its factorization.

261113416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32639183 (or 32639179 counting only the distinct ones).

The product of its digits is 864, while the sum is 25.

The square root of 261113416 is about 16159.0041772382. The cubic root of 261113416 is about 639.1602071194.

Adding to 261113416 its reverse (614311162), we get a palindrome (875424578).

The spelling of 261113416 in words is "two hundred sixty-one million, one hundred thirteen thousand, four hundred sixteen".