1365445845 has 24 divisors (see below), whose sum is σ = 2372198400. Its totient is φ = 726568416.

The previous prime is 1365445819. The next prime is 1365445847. The reversal of 1365445845 is 5485445631.

1365445845 is a `hidden beast` number, since 1 + 3 + 65 + 4 + 4 + 584 + 5 = 666.

It is not a de Polignac number, because 1365445845 - 2²⁰ = 1364397269 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 1365445845.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1365445847) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14805 + ... + 54314.

It is an arithmetic number, because the mean of its divisors is an integer number (98841600).

Almost surely, 2^1365445845 is an apocalyptic number.

1365445845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1365445845 is a deficient number, since it is larger than the sum of its proper divisors (1006752555).

1365445845 is a wasteful number, since it uses less digits than its factorization.

1365445845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69569 (or 69566 counting only the distinct ones).

The product of its digits is 1152000, while the sum is 45.

The square root of 1365445845 is about 36951.9396649215. The cubic root of 1365445845 is about 1109.4085112617.

The spelling of 1365445845 in words is "one billion, three hundred sixty-five million, four hundred forty-five thousand, eight hundred forty-five".