80511478 has 4 divisors (see below), whose sum is σ = 120767220. Its totient is φ = 40255738.

The previous prime is 80511469. The next prime is 80511479. The reversal of 80511478 is 87411508.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80511479) 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 as a sum of consecutive naturals, namely, 20127868 + ... + 20127871.

It is an arithmetic number, because the mean of its divisors is an integer number (30191805).

Almost surely, 2^80511478 is an apocalyptic number.

80511478 is a deficient number, since it is larger than the sum of its proper divisors (40255742).

80511478 is a wasteful number, since it uses less digits than its factorization.

80511478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40255741.

The product of its (nonzero) digits is 8960, while the sum is 34.

The square root of 80511478 is about 8972.8188435965. The cubic root of 80511478 is about 431.8032761990.

The spelling of 80511478 in words is "eighty million, five hundred eleven thousand, four hundred seventy-eight".