368668561 has 8 divisors (see below), whose sum is σ = 381666600. Its totient is φ = 355689600.

The previous prime is 368668543. The next prime is 368668591. The reversal of 368668561 is 165866863.

It can be written as a sum of positive squares in 4 ways, for example, as 196560400 + 172108161 = 14020^2 + 13119^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 368668561 - 2⁵ = 368668529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (368668591) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42711 + ... + 50611.

It is an arithmetic number, because the mean of its divisors is an integer number (47708325).

Almost surely, 2^368668561 is an apocalyptic number.

It is an amenable number.

368668561 is a deficient number, since it is larger than the sum of its proper divisors (12998039).

368668561 is a wasteful number, since it uses less digits than its factorization.

368668561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9539.

The product of its digits is 1244160, while the sum is 49.

The square root of 368668561 is about 19200.7437616359. The cubic root of 368668561 is about 717.0432765347.

The spelling of 368668561 in words is "three hundred sixty-eight million, six hundred sixty-eight thousand, five hundred sixty-one".