919719664 has 20 divisors (see below), whose sum is σ = 1782449656. Its totient is φ = 459732672.

The previous prime is 919719637. The next prime is 919719701. The reversal of 919719664 is 466917919.

It is a super-3 number, since 3×919719664³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83842 + ... + 94174.

Almost surely, 2^919719664 is an apocalyptic number.

It is an amenable number.

919719664 is a deficient number, since it is larger than the sum of its proper divisors (862729992).

919719664 is a wasteful number, since it uses less digits than its factorization.

919719664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15904 (or 15898 counting only the distinct ones).

The product of its digits is 734832, while the sum is 52.

The square root of 919719664 is about 30326.8802220077. The cubic root of 919719664 is about 972.4900293495.

The spelling of 919719664 in words is "nine hundred nineteen million, seven hundred nineteen thousand, six hundred sixty-four".