80645965 has 16 divisors (see below), whose sum is σ = 99636480. Its totient is φ = 62637120.

The previous prime is 80645959. The next prime is 80645969. The reversal of 80645965 is 56954608.

It is not a de Polignac number, because 80645965 - 2⁵ = 80645933 is a prime.

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 polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22422 + ... + 25768.

It is an arithmetic number, because the mean of its divisors is an integer number (6227280).

Almost surely, 2^80645965 is an apocalyptic number.

It is an amenable number.

80645965 is a deficient number, since it is larger than the sum of its proper divisors (18990515).

80645965 is a wasteful number, since it uses less digits than its factorization.

80645965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3492.

The product of its (nonzero) digits is 259200, while the sum is 43.

The square root of 80645965 is about 8980.3098498883. The cubic root of 80645965 is about 432.0435716369.

The spelling of 80645965 in words is "eighty million, six hundred forty-five thousand, nine hundred sixty-five".