1868815064 has 8 divisors (see below), whose sum is σ = 3504028260. Its totient is φ = 934407528.

The previous prime is 1868815063. The next prime is 1868815097. The reversal of 1868815064 is 4605188681.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1868815061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116800934 + ... + 116800949.

Almost surely, 2^1868815064 is an apocalyptic number.

It is an amenable number.

1868815064 is a deficient number, since it is larger than the sum of its proper divisors (1635213196).

1868815064 is a wasteful number, since it uses less digits than its factorization.

1868815064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233601889 (or 233601885 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 47.

The square root of 1868815064 is about 43229.7937075809. The cubic root of 1868815064 is about 1231.7486890414.

The spelling of 1868815064 in words is "one billion, eight hundred sixty-eight million, eight hundred fifteen thousand, sixty-four".