80787645 has 16 divisors (see below), whose sum is σ = 143622720. Its totient is φ = 43086672.

The previous prime is 80787631. The next prime is 80787653. The reversal of 80787645 is 54678708.

It is not a de Polignac number, because 80787645 - 2¹⁰ = 80786621 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 80787645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 299079 + ... + 299348.

It is an arithmetic number, because the mean of its divisors is an integer number (8976420).

Almost surely, 2^80787645 is an apocalyptic number.

It is an amenable number.

80787645 is a deficient number, since it is larger than the sum of its proper divisors (62835075).

80787645 is a wasteful number, since it uses less digits than its factorization.

80787645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598441 (or 598435 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The square root of 80787645 is about 8988.1947575695. The cubic root of 80787645 is about 432.2964304219.

The spelling of 80787645 in words is "eighty million, seven hundred eighty-seven thousand, six hundred forty-five".