261461230540 has 12 divisors (see below), whose sum is σ = 549068584176. Its totient is φ = 104584492208.

The previous prime is 261461230531. The next prime is 261461230571. The reversal of 261461230540 is 45032164162.

261461230540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 261461230496 and 261461230505.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6536530744 + ... + 6536530783.

It is an arithmetic number, because the mean of its divisors is an integer number (45755715348).

Almost surely, 2^261461230540 is an apocalyptic number.

261461230540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261461230540 is an abundant number, since it is smaller than the sum of its proper divisors (287607353636).

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

261461230540 is a wasteful number, since it uses less digits than its factorization.

261461230540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13073061536 (or 13073061534 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

The spelling of 261461230540 in words is "two hundred sixty-one billion, four hundred sixty-one million, two hundred thirty thousand, five hundred forty".