1378073565 has 96 divisors (see below), whose sum is σ = 2663331840. Its totient is φ = 653616000.

The previous prime is 1378073563. The next prime is 1378073579. The reversal of 1378073565 is 5653708731.

1378073565 is a `hidden beast` number, since 1 + 3 + 7 + 80 + 7 + 3 + 565 = 666.

It is not a de Polignac number, because 1378073565 - 2¹ = 1378073563 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1378073565.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378073563) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 7698646 + ... + 7698824.

It is an arithmetic number, because the mean of its divisors is an integer number (27743040).

Almost surely, 2^1378073565 is an apocalyptic number.

1378073565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1378073565 is a deficient number, since it is larger than the sum of its proper divisors (1285258275).

1378073565 is a wasteful number, since it uses less digits than its factorization.

1378073565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455 (or 452 counting only the distinct ones).

The product of its (nonzero) digits is 529200, while the sum is 45.

The square root of 1378073565 is about 37122.4132432147. The cubic root of 1378073565 is about 1112.8179798872.

The spelling of 1378073565 in words is "one billion, three hundred seventy-eight million, seventy-three thousand, five hundred sixty-five".