261468538 has 16 divisors (see below), whose sum is σ = 414396000. Its totient is φ = 123388272.

The previous prime is 261468503. The next prime is 261468541. The reversal of 261468538 is 835864162.

It is a junction number, because it is equal to n+sod(n) for n = 261468494 and 261468503.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2568 + ... + 23011.

It is an arithmetic number, because the mean of its divisors is an integer number (25899750).

Almost surely, 2^261468538 is an apocalyptic number.

261468538 is a deficient number, since it is larger than the sum of its proper divisors (152927462).

261468538 is a wasteful number, since it uses less digits than its factorization.

261468538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25869.

The product of its digits is 276480, while the sum is 43.

The square root of 261468538 is about 16169.9888064278. The cubic root of 261468538 is about 639.4498348125.

The spelling of 261468538 in words is "two hundred sixty-one million, four hundred sixty-eight thousand, five hundred thirty-eight".