1378056065 has 8 divisors (see below), whose sum is σ = 1659816360. Its totient is φ = 1098345472.

The previous prime is 1378056061. The next prime is 1378056077. The reversal of 1378056065 is 5606508731.

It can be written as a sum of positive squares in 4 ways, for example, as 3055504 + 1375000561 = 1748^2 + 37081^2 .

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 1378056065 - 2² = 1378056061 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1378056061) 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, 510944 + ... + 513633.

It is an arithmetic number, because the mean of its divisors is an integer number (207477045).

Almost surely, 2^1378056065 is an apocalyptic number.

It is an amenable number.

1378056065 is a deficient number, since it is larger than the sum of its proper divisors (281760295).

1378056065 is a wasteful number, since it uses less digits than its factorization.

1378056065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1024851.

The product of its (nonzero) digits is 151200, while the sum is 41.

The square root of 1378056065 is about 37122.1775358074. The cubic root of 1378056065 is about 1112.8132693508.

The spelling of 1378056065 in words is "one billion, three hundred seventy-eight million, fifty-six thousand, sixty-five".