261440114565542 has 8 divisors (see below), whose sum is σ = 427811096561832. Its totient is φ = 118836415711600.

The previous prime is 261440114565533. The next prime is 261440114565563. The reversal of 261440114565542 is 245565411044162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5941820785559 + ... + 5941820785602.

It is an arithmetic number, because the mean of its divisors is an integer number (53476387070229).

Almost surely, 2^{261440114565542} is an apocalyptic number.

261440114565542 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

261440114565542 is a deficient number, since it is larger than the sum of its proper divisors (166370981996290).

261440114565542 is a wasteful number, since it uses less digits than its factorization.

261440114565542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11883641571174.

The product of its (nonzero) digits is 4608000, while the sum is 50.

The spelling of 261440114565542 in words is "two hundred sixty-one trillion, four hundred forty billion, one hundred fourteen million, five hundred sixty-five thousand, five hundred forty-two".