261251626434252 has 24 divisors (see below), whose sum is σ = 610681539723696. Its totient is φ = 86927530995648.

The previous prime is 261251626434209. The next prime is 261251626434277. The reversal of 261251626434252 is 252434626152162.

It is a junction number, because it is equal to n+sod(n) for n = 261251626434195 and 261251626434204.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19543053343 + ... + 19543066710.

It is an arithmetic number, because the mean of its divisors is an integer number (25445064155154).

Almost surely, 2^{261251626434252} is an apocalyptic number.

It is an amenable number.

261251626434252 is an abundant number, since it is smaller than the sum of its proper divisors (349429913289444).

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

261251626434252 is a wasteful number, since it uses less digits than its factorization.

261251626434252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39086120617 (or 39086120615 counting only the distinct ones).

The product of its digits is 8294400, while the sum is 51.

The spelling of 261251626434252 in words is "two hundred sixty-one trillion, two hundred fifty-one billion, six hundred twenty-six million, four hundred thirty-four thousand, two hundred fifty-two".