80219664 has 90 divisors (see below), whose sum is σ = 261180270. Its totient is φ = 22917888.

The previous prime is 80219609. The next prime is 80219693. The reversal of 80219664 is 46691208.

It can be written as a sum of positive squares in only one way, i.e., 70560000 + 9659664 = 8400^2 + 3108^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1372 + ... + 12740.

It is an arithmetic number, because the mean of its divisors is an integer number (2902003).

Almost surely, 2^80219664 is an apocalyptic number.

80219664 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80219664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130590135).

80219664 is an abundant number, since it is smaller than the sum of its proper divisors (180960606).

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

80219664 is a wasteful number, since it uses less digits than its factorization.

80219664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11397 (or 11381 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 80219664 is about 8956.5430831320. The cubic root of 80219664 is about 431.2809540478.

The spelling of 80219664 in words is "eighty million, two hundred nineteen thousand, six hundred sixty-four".