261546316266 has 16 divisors (see below), whose sum is σ = 523124417088. Its totient is φ = 87176808000.

The previous prime is 261546316261. The next prime is 261546316277. The reversal of 261546316266 is 662613645162.

It is not an unprimeable number, because it can be changed into a prime (261546316261) 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, 1216710 + ... + 1415441.

It is an arithmetic number, because the mean of its divisors is an integer number (32695276068).

Almost surely, 2^261546316266 is an apocalyptic number.

261546316266 is an abundant number, since it is smaller than the sum of its proper divisors (261578100822).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261546316266 is a wasteful number, since it uses less digits than its factorization.

261546316266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2648717.

The product of its digits is 1866240, while the sum is 48.

The spelling of 261546316266 in words is "two hundred sixty-one billion, five hundred forty-six million, three hundred sixteen thousand, two hundred sixty-six".