261481516 has 24 divisors (see below), whose sum is σ = 486173520. Its totient is φ = 122818752.

The previous prime is 261481511. The next prime is 261481531. The reversal of 261481516 is 615184162.

It is not an unprimeable number, because it can be changed into a prime (261481511) 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, 26170 + ... + 34753.

It is an arithmetic number, because the mean of its divisors is an integer number (20257230).

Almost surely, 2^261481516 is an apocalyptic number.

It is an amenable number.

261481516 is a deficient number, since it is larger than the sum of its proper divisors (224692004).

261481516 is a wasteful number, since it uses less digits than its factorization.

261481516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60993 (or 60991 counting only the distinct ones).

The product of its digits is 11520, while the sum is 34.

The square root of 261481516 is about 16170.3901004274. The cubic root of 261481516 is about 639.4604143424.

The spelling of 261481516 in words is "two hundred sixty-one million, four hundred eighty-one thousand, five hundred sixteen".