1864065816 has 48 divisors (see below), whose sum is σ = 5131286160. Its totient is φ = 611167680.

The previous prime is 1864065787. The next prime is 1864065823. The reversal of 1864065816 is 6185604681.

1864065816 is a `hidden beast` number, since 1 + 8 + 64 + 0 + 6 + 581 + 6 = 666.

1864065816 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 207820 + ... + 216603.

It is an arithmetic number, because the mean of its divisors is an integer number (106901795).

Almost surely, 2^1864065816 is an apocalyptic number.

It is an amenable number.

1864065816 is an abundant number, since it is smaller than the sum of its proper divisors (3267220344).

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

1864065816 is a wasteful number, since it uses less digits than its factorization.

1864065816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424496 (or 424489 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The square root of 1864065816 is about 43174.8284999489. The cubic root of 1864065816 is about 1230.7043833774.

The spelling of 1864065816 in words is "one billion, eight hundred sixty-four million, sixty-five thousand, eight hundred sixteen".