340863561 has 6 divisors (see below), whose sum is σ = 492358490. Its totient is φ = 227242368.

The previous prime is 340863527. The next prime is 340863571. The reversal of 340863561 is 165368043.

340863561 is a `hidden beast` number, since 34 + 0 + 8 + 63 + 561 = 666.

It can be written as a sum of positive squares in only one way, i.e., 277422336 + 63441225 = 16656^2 + 7965^2 .

It is not a de Polignac number, because 340863561 - 2⁹ = 340863049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (340863571) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 18936856 + ... + 18936873.

Almost surely, 2^340863561 is an apocalyptic number.

It is an amenable number.

340863561 is a deficient number, since it is larger than the sum of its proper divisors (151494929).

340863561 is a wasteful number, since it uses less digits than its factorization.

340863561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37873735 (or 37873732 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 340863561 is about 18462.4906499638. The cubic root of 340863561 is about 698.5436121438.

The spelling of 340863561 in words is "three hundred forty million, eight hundred sixty-three thousand, five hundred sixty-one".