261303451516 has 12 divisors (see below), whose sum is σ = 460771736040. Its totient is φ = 129654384080.

The previous prime is 261303451489. The next prime is 261303451517. The reversal of 261303451516 is 615154303162.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261303451517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249334831 + ... + 249335878.

It is an arithmetic number, because the mean of its divisors is an integer number (38397644670).

Almost surely, 2^261303451516 is an apocalyptic number.

It is an amenable number.

261303451516 is a deficient number, since it is larger than the sum of its proper divisors (199468284524).

261303451516 is a wasteful number, since it uses less digits than its factorization.

261303451516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498670844 (or 498670842 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 37.

Adding to 261303451516 its reverse (615154303162), we get a palindrome (876457754678).

The spelling of 261303451516 in words is "two hundred sixty-one billion, three hundred three million, four hundred fifty-one thousand, five hundred sixteen".