261425668 has 24 divisors (see below), whose sum is σ = 523196352. Its totient is φ = 111965664.

The previous prime is 261425653. The next prime is 261425701. The reversal of 261425668 is 866524162.

261425668 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 261425668.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73671 + ... + 77137.

It is an arithmetic number, because the mean of its divisors is an integer number (21799848).

Almost surely, 2^261425668 is an apocalyptic number.

261425668 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

261425668 is an abundant number, since it is smaller than the sum of its proper divisors (261770684).

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

261425668 is a wasteful number, since it uses less digits than its factorization.

261425668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6171 (or 6169 counting only the distinct ones).

The product of its digits is 138240, while the sum is 40.

The square root of 261425668 is about 16168.6631482012. The cubic root of 261425668 is about 639.4148851483.

It can be divided in two parts, 2614 and 25668, that added together give a palindrome (28282).

The spelling of 261425668 in words is "two hundred sixty-one million, four hundred twenty-five thousand, six hundred sixty-eight".