261424616 has 32 divisors (see below), whose sum is σ = 495384960. Its totient is φ = 129330432.

The previous prime is 261424613. The next prime is 261424621. The reversal of 261424616 is 616424162.

261424616 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×261424616³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (261424613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 564401 + ... + 564863.

It is an arithmetic number, because the mean of its divisors is an integer number (15480780).

Almost surely, 2^261424616 is an apocalyptic number.

It is an amenable number.

261424616 is a deficient number, since it is larger than the sum of its proper divisors (233960344).

261424616 is a wasteful number, since it uses less digits than its factorization.

261424616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1065 (or 1061 counting only the distinct ones).

The product of its digits is 13824, while the sum is 32.

The square root of 261424616 is about 16168.6306161035. The cubic root of 261424616 is about 639.4140274599.

Adding to 261424616 its reverse (616424162), we get a palindrome (877848778).

The spelling of 261424616 in words is "two hundred sixty-one million, four hundred twenty-four thousand, six hundred sixteen".