261842318622 has 24 divisors (see below), whose sum is σ = 570604365864. Its totient is φ = 86776258704.

The previous prime is 261842318603. The next prime is 261842318629. The reversal of 261842318622 is 226813248162.

261842318622 is a `hidden beast` number, since 2 + 6 + 1 + 8 + 4 + 2 + 3 + 18 + 622 = 666.

It is a super-2 number, since 2×261842318622² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261842318629) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42039648 + ... + 42045875.

It is an arithmetic number, because the mean of its divisors is an integer number (23775181911).

Almost surely, 2^261842318622 is an apocalyptic number.

261842318622 is an abundant number, since it is smaller than the sum of its proper divisors (308762047242).

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

261842318622 is a wasteful number, since it uses less digits than its factorization.

261842318622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84085704 (or 84085701 counting only the distinct ones).

The product of its digits is 442368, while the sum is 45.

The spelling of 261842318622 in words is "two hundred sixty-one billion, eight hundred forty-two million, three hundred eighteen thousand, six hundred twenty-two".