1365819564 has 12 divisors (see below), whose sum is σ = 3186912344. Its totient is φ = 455273184.

The previous prime is 1365819563. The next prime is 1365819571. The reversal of 1365819564 is 4659185631.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (1365819563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56909137 + ... + 56909160.

Almost surely, 2^1365819564 is an apocalyptic number.

It is an amenable number.

1365819564 is an abundant number, since it is smaller than the sum of its proper divisors (1821092780).

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

1365819564 is a wasteful number, since it uses less digits than its factorization.

1365819564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113818304 (or 113818302 counting only the distinct ones).

The product of its digits is 777600, while the sum is 48.

The square root of 1365819564 is about 36956.9961441673. The cubic root of 1365819564 is about 1109.5097161102.

The spelling of 1365819564 in words is "one billion, three hundred sixty-five million, eight hundred nineteen thousand, five hundred sixty-four".