261598740466 has 16 divisors (see below), whose sum is σ = 448733738880. Its totient is φ = 112044057120.

The previous prime is 261598740461. The next prime is 261598740479. The reversal of 261598740466 is 664047895162.

261598740466 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 261598740466.

It is not an unprimeable number, because it can be changed into a prime (261598740461) 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, 5784070 + ... + 5829121.

It is an arithmetic number, because the mean of its divisors is an integer number (28045858680).

Almost surely, 2^261598740466 is an apocalyptic number.

261598740466 is a deficient number, since it is larger than the sum of its proper divisors (187134998414).

261598740466 is a wasteful number, since it uses less digits than its factorization.

261598740466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11614809.

The product of its (nonzero) digits is 17418240, while the sum is 58.

The spelling of 261598740466 in words is "two hundred sixty-one billion, five hundred ninety-eight million, seven hundred forty thousand, four hundred sixty-six".