80738505 has 32 divisors (see below), whose sum is σ = 151094400. Its totient is φ = 40792896.

The previous prime is 80738503. The next prime is 80738509. The reversal of 80738505 is 50583708.

It is a happy number.

80738505 is a `hidden beast` number, since 80 + 73 + 8 + 505 = 666.

It is not a de Polignac number, because 80738505 - 2¹ = 80738503 is a prime.

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 80738505.

It is not an unprimeable number, because it can be changed into a prime (80738501) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13174 + ... + 18303.

It is an arithmetic number, because the mean of its divisors is an integer number (4721700).

Almost surely, 2^80738505 is an apocalyptic number.

It is an amenable number.

80738505 is a deficient number, since it is larger than the sum of its proper divisors (70355895).

80738505 is a wasteful number, since it uses less digits than its factorization.

80738505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31510 (or 31504 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 80738505 is about 8985.4607561327. The cubic root of 80738505 is about 432.2087629113.

The spelling of 80738505 in words is "eighty million, seven hundred thirty-eight thousand, five hundred five".