80815454 has 4 divisors (see below), whose sum is σ = 121223184. Its totient is φ = 40407726.

The previous prime is 80815439. The next prime is 80815459. The reversal of 80815454 is 45451808.

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

It is a super-2 number, since 2×80815454² = 13062275210452232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80815459) 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, 20203862 + ... + 20203865.

It is an arithmetic number, because the mean of its divisors is an integer number (30305796).

Almost surely, 2^80815454 is an apocalyptic number.

80815454 is a deficient number, since it is larger than the sum of its proper divisors (40407730).

80815454 is a wasteful number, since it uses less digits than its factorization.

80815454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40407729.

The product of its (nonzero) digits is 25600, while the sum is 35.

The square root of 80815454 is about 8989.7415980661. The cubic root of 80815454 is about 432.3460269177.

The spelling of 80815454 in words is "eighty million, eight hundred fifteen thousand, four hundred fifty-four".