1368563646 has 32 divisors (see below), whose sum is σ = 2787742080. Its totient is φ = 447775776.

The previous prime is 1368563633. The next prime is 1368563657. The reversal of 1368563646 is 6463658631.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1368563595 and 1368563604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 265425 + ... + 270531.

It is an arithmetic number, because the mean of its divisors is an integer number (87116940).

Almost surely, 2^1368563646 is an apocalyptic number.

1368563646 is an abundant number, since it is smaller than the sum of its proper divisors (1419178434).

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

1368563646 is a wasteful number, since it uses less digits than its factorization.

1368563646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5928.

The product of its digits is 1866240, while the sum is 48.

The square root of 1368563646 is about 36994.1028543740. The cubic root of 1368563646 is about 1110.2522614714.

The spelling of 1368563646 in words is "one billion, three hundred sixty-eight million, five hundred sixty-three thousand, six hundred forty-six".