261430425425436 has 24 divisors (see below), whose sum is σ = 611419649266944. Its totient is φ = 86941286102640.

The previous prime is 261430425425359. The next prime is 261430425425459. The reversal of 261430425425436 is 634524524034162.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25273624510 + ... + 25273634853.

It is an arithmetic number, because the mean of its divisors is an integer number (25475818719456).

Almost surely, 2^{261430425425436} is an apocalyptic number.

It is an amenable number.

261430425425436 is an abundant number, since it is smaller than the sum of its proper divisors (349989223841508).

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

261430425425436 is a wasteful number, since it uses less digits than its factorization.

261430425425436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50547259801 (or 50547259799 counting only the distinct ones).

The product of its (nonzero) digits is 16588800, while the sum is 51.

Adding to 261430425425436 its reverse (634524524034162), we get a palindrome (895954949459598).

The spelling of 261430425425436 in words is "two hundred sixty-one trillion, four hundred thirty billion, four hundred twenty-five million, four hundred twenty-five thousand, four hundred thirty-six".