80645968 has 20 divisors (see below), whose sum is σ = 168271348. Its totient is φ = 37221120.

The previous prime is 80645959. The next prime is 80645969. The reversal of 80645968 is 86954608.

It can be written as a sum of positive squares in 2 ways, for example, as 40602384 + 40043584 = 6372^2 + 6328^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80645969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193653 + ... + 194068.

Almost surely, 2^80645968 is an apocalyptic number.

It is an amenable number.

80645968 is an abundant number, since it is smaller than the sum of its proper divisors (87625380).

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

80645968 is a wasteful number, since it uses less digits than its factorization.

80645968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387742 (or 387736 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 46.

The square root of 80645968 is about 8980.3100169204. The cubic root of 80645968 is about 432.0435769942.

The spelling of 80645968 in words is "eighty million, six hundred forty-five thousand, nine hundred sixty-eight".