1868692664 has 8 divisors (see below), whose sum is σ = 3503798760. Its totient is φ = 934346328.

The previous prime is 1868692643. The next prime is 1868692703. The reversal of 1868692664 is 4662968681.

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

It is a congruent number.

It is an unprimeable number.

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, 116793284 + ... + 116793299.

It is an arithmetic number, because the mean of its divisors is an integer number (437974845).

Almost surely, 2^1868692664 is an apocalyptic number.

It is an amenable number.

1868692664 is a deficient number, since it is larger than the sum of its proper divisors (1635106096).

1868692664 is a wasteful number, since it uses less digits than its factorization.

1868692664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233586589 (or 233586585 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 56.

The square root of 1868692664 is about 43228.3779940909. The cubic root of 1868692664 is about 1231.7217968975.

The spelling of 1868692664 in words is "one billion, eight hundred sixty-eight million, six hundred ninety-two thousand, six hundred sixty-four".