261652217622 has 8 divisors (see below), whose sum is σ = 523304435256. Its totient is φ = 87217405872.

The previous prime is 261652217621. The next prime is 261652217633. The reversal of 261652217622 is 226712256162.

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

261652217622 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261652217621) 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, 21804351463 + ... + 21804351474.

It is an arithmetic number, because the mean of its divisors is an integer number (65413054407).

Almost surely, 2^261652217622 is an apocalyptic number.

261652217622 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

261652217622 is a wasteful number, since it uses less digits than its factorization.

261652217622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43608702942.

The product of its digits is 241920, while the sum is 42.

The spelling of 261652217622 in words is "two hundred sixty-one billion, six hundred fifty-two million, two hundred seventeen thousand, six hundred twenty-two".