80782154 has 4 divisors (see below), whose sum is σ = 121173234. Its totient is φ = 40391076.

The previous prime is 80782153. The next prime is 80782159. The reversal of 80782154 is 45128708.

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

It can be written as a sum of positive squares in only one way, i.e., 80013025 + 769129 = 8945^2 + 877^2 .

It is not an unprimeable number, because it can be changed into a prime (80782153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20195537 + ... + 20195540.

Almost surely, 2^80782154 is an apocalyptic number.

80782154 is a deficient number, since it is larger than the sum of its proper divisors (40391080).

80782154 is a wasteful number, since it uses less digits than its factorization.

80782154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40391079.

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 80782154 is about 8987.8892961585. The cubic root of 80782154 is about 432.2866360468.

The spelling of 80782154 in words is "eighty million, seven hundred eighty-two thousand, one hundred fifty-four".