80505775 has 18 divisors (see below), whose sum is σ = 116127240. Its totient is φ = 55203120.

The previous prime is 80505757. The next prime is 80505779. The reversal of 80505775 is 57750508.

It is not a de Polignac number, because 80505775 - 2⁷ = 80505647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80505779) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 31635 + ... + 34084.

Almost surely, 2^80505775 is an apocalyptic number.

80505775 is a deficient number, since it is larger than the sum of its proper divisors (35621465).

80505775 is a wasteful number, since it uses less digits than its factorization.

80505775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65743 (or 65731 counting only the distinct ones).

The product of its (nonzero) digits is 49000, while the sum is 37.

The square root of 80505775 is about 8972.5010448592. The cubic root of 80505775 is about 431.7930804178.

The spelling of 80505775 in words is "eighty million, five hundred five thousand, seven hundred seventy-five".