80609664 has 64 divisors (see below), whose sum is σ = 223453440. Its totient is φ = 25698816.

The previous prime is 80609657. The next prime is 80609677. The reversal of 80609664 is 46690608.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4269 + ... + 13395.

It is an arithmetic number, because the mean of its divisors is an integer number (3491460).

Almost surely, 2^80609664 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 80609664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111726720).

80609664 is an abundant number, since it is smaller than the sum of its proper divisors (142843776).

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

80609664 is a wasteful number, since it uses less digits than its factorization.

80609664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9167 (or 9155 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 80609664 is about 8978.2884783237. The cubic root of 80609664 is about 431.9787369507.

The spelling of 80609664 in words is "eighty million, six hundred nine thousand, six hundred sixty-four".