261775204576 has 24 divisors (see below), whose sum is σ = 515392282944. Its totient is φ = 130881926400.

The previous prime is 261775204571. The next prime is 261775204583. The reversal of 261775204576 is 675402577162.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261775204571) 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, 628401 + ... + 958351.

It is an arithmetic number, because the mean of its divisors is an integer number (21474678456).

Almost surely, 2^261775204576 is an apocalyptic number.

It is an amenable number.

261775204576 is a deficient number, since it is larger than the sum of its proper divisors (253617078368).

261775204576 is a wasteful number, since it uses less digits than its factorization.

261775204576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354754 (or 354746 counting only the distinct ones).

The product of its (nonzero) digits is 4939200, while the sum is 52.

The spelling of 261775204576 in words is "two hundred sixty-one billion, seven hundred seventy-five million, two hundred four thousand, five hundred seventy-six".