916489664 has 56 divisors (see below), whose sum is σ = 1845076320. Its totient is φ = 451641344.

The previous prime is 916489663. The next prime is 916489709. The reversal of 916489664 is 466984619.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (916489661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2552717 + ... + 2553075.

Almost surely, 2^916489664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 916489664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (922538160).

916489664 is an abundant number, since it is smaller than the sum of its proper divisors (928586656).

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

916489664 is a wasteful number, since it uses less digits than its factorization.

916489664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 837 (or 827 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 53.

The square root of 916489664 is about 30273.5802970181. The cubic root of 916489664 is about 971.3502519162.

The spelling of 916489664 in words is "nine hundred sixteen million, four hundred eighty-nine thousand, six hundred sixty-four".