80561875 has 20 divisors (see below), whose sum is σ = 101948616. Its totient is φ = 63632000.

The previous prime is 80561869. The next prime is 80561911. The reversal of 80561875 is 57816508.

It is not a de Polignac number, because 80561875 - 2¹¹ = 80559827 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 51099 + ... + 52651.

Almost surely, 2^80561875 is an apocalyptic number.

80561875 is a deficient number, since it is larger than the sum of its proper divisors (21386741).

80561875 is an equidigital number, since it uses as much as digits as its factorization.

80561875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1656 (or 1641 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 40.

The square root of 80561875 is about 8975.6267190654. The cubic root of 80561875 is about 431.8933546623.

The spelling of 80561875 in words is "eighty million, five hundred sixty-one thousand, eight hundred seventy-five".