80815478 has 8 divisors (see below), whose sum is σ = 122108472. Its totient is φ = 40112656.

The previous prime is 80815477. The next prime is 80815519. The reversal of 80815478 is 87451808.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×80815478² = 13062282968736968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80815477) 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 3 ways as a sum of consecutive naturals, for example, 147200 + ... + 147747.

It is an arithmetic number, because the mean of its divisors is an integer number (15263559).

Almost surely, 2^80815478 is an apocalyptic number.

80815478 is a deficient number, since it is larger than the sum of its proper divisors (41292994).

80815478 is a wasteful number, since it uses less digits than its factorization.

80815478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295086.

The product of its (nonzero) digits is 71680, while the sum is 41.

The square root of 80815478 is about 8989.7429329208. The cubic root of 80815478 is about 432.3460697161.

The spelling of 80815478 in words is "eighty million, eight hundred fifteen thousand, four hundred seventy-eight".