261334380833562 has 16 divisors (see below), whose sum is σ = 522668971262592. Its totient is φ = 87111425345280.

The previous prime is 261334380833549. The next prime is 261334380833567. The reversal of 261334380833562 is 265338083433162.

It is a super-2 number, since 2×261334380833562² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (261334380833567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10855887 + ... + 25308477.

It is an arithmetic number, because the mean of its divisors is an integer number (32666810703912).

Almost surely, 2^{261334380833562} is an apocalyptic number.

261334380833562 is an abundant number, since it is smaller than the sum of its proper divisors (261334590429030).

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

261334380833562 is a wasteful number, since it uses less digits than its factorization.

261334380833562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17466293.

The product of its (nonzero) digits is 44789760, while the sum is 57.

The spelling of 261334380833562 in words is "two hundred sixty-one trillion, three hundred thirty-four billion, three hundred eighty million, eight hundred thirty-three thousand, five hundred sixty-two".