1368045578 has 4 divisors (see below), whose sum is σ = 2052068370. Its totient is φ = 684022788.

The previous prime is 1368045571. The next prime is 1368045643. The reversal of 1368045578 is 8755408631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8755408631 = 5039 ⋅1737529.

It can be written as a sum of positive squares in only one way, i.e., 1176970249 + 191075329 = 34307^2 + 13823^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1368045571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342011393 + ... + 342011396.

Almost surely, 2^1368045578 is an apocalyptic number.

1368045578 is a deficient number, since it is larger than the sum of its proper divisors (684022792).

1368045578 is an equidigital number, since it uses as much as digits as its factorization.

1368045578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684022791.

The product of its (nonzero) digits is 806400, while the sum is 47.

The square root of 1368045578 is about 36987.1001566762. The cubic root of 1368045578 is about 1110.1121489370.

The spelling of 1368045578 in words is "one billion, three hundred sixty-eight million, forty-five thousand, five hundred seventy-eight".