261044797318 has 16 divisors (see below), whose sum is σ = 393786146160. Its totient is φ = 129783527776.

The previous prime is 261044797301. The next prime is 261044797319. The reversal of 261044797318 is 813797440162.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261044797319) 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, 479505 + ... + 867187.

It is an arithmetic number, because the mean of its divisors is an integer number (24611634135).

Almost surely, 2^261044797318 is an apocalyptic number.

261044797318 is a deficient number, since it is larger than the sum of its proper divisors (132741348842).

261044797318 is a wasteful number, since it uses less digits than its factorization.

261044797318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389591.

The product of its (nonzero) digits is 2032128, while the sum is 52.

The spelling of 261044797318 in words is "two hundred sixty-one billion, forty-four million, seven hundred ninety-seven thousand, three hundred eighteen".