261030567643 has 8 divisors (see below), whose sum is σ = 263145166416. Its totient is φ = 258917817600.

The previous prime is 261030567583. The next prime is 261030567649. The reversal of 261030567643 is 346765030162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261030567643 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 261030567643.

It is not an unprimeable number, because it can be changed into a prime (261030567649) 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, 177946 + ... + 744127.

It is an arithmetic number, because the mean of its divisors is an integer number (32893145802).

Almost surely, 2^261030567643 is an apocalyptic number.

261030567643 is a deficient number, since it is larger than the sum of its proper divisors (2114598773).

261030567643 is a wasteful number, since it uses less digits than its factorization.

261030567643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 924365.

The product of its (nonzero) digits is 544320, while the sum is 43.

The spelling of 261030567643 in words is "two hundred sixty-one billion, thirty million, five hundred sixty-seven thousand, six hundred forty-three".