261022634089 has 8 divisors (see below), whose sum is σ = 298834023488. Its totient is φ = 223341855120.

The previous prime is 261022634077. The next prime is 261022634111. The reversal of 261022634089 is 980436220162.

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-261022634089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (261022634689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32648322 + ... + 32656315.

It is an arithmetic number, because the mean of its divisors is an integer number (37354252936).

Almost surely, 2^261022634089 is an apocalyptic number.

It is an amenable number.

261022634089 is a deficient number, since it is larger than the sum of its proper divisors (37811389399).

261022634089 is an equidigital number, since it uses as much as digits as its factorization.

261022634089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65305215.

The product of its (nonzero) digits is 248832, while the sum is 43.

The spelling of 261022634089 in words is "two hundred sixty-one billion, twenty-two million, six hundred thirty-four thousand, eighty-nine".