80503605 has 64 divisors (see below), whose sum is σ = 176171520. Its totient is φ = 33965568.

The previous prime is 80503603. The next prime is 80503637. The reversal of 80503605 is 50630508.

80503605 is a `hidden beast` number, since 8 + 0 + 50 + 3 + 605 = 666.

It is not a de Polignac number, because 80503605 - 2¹ = 80503603 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80503603) 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 63 ways as a sum of consecutive naturals, for example, 9009 + ... + 15561.

It is an arithmetic number, because the mean of its divisors is an integer number (2752680).

Almost surely, 2^80503605 is an apocalyptic number.

It is an amenable number.

80503605 is an abundant number, since it is smaller than the sum of its proper divisors (95667915).

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

80503605 is a wasteful number, since it uses less digits than its factorization.

80503605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6587 (or 6581 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 80503605 is about 8972.3801190097. The cubic root of 80503605 is about 431.7892007814.

The spelling of 80503605 in words is "eighty million, five hundred three thousand, six hundred five".