80775782 has 4 divisors (see below), whose sum is σ = 121163676. Its totient is φ = 40387890.

The previous prime is 80775769. The next prime is 80775787. The reversal of 80775782 is 28757708.

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 (80775787) 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, 20193944 + ... + 20193947.

It is an arithmetic number, because the mean of its divisors is an integer number (30290919).

Almost surely, 2^80775782 is an apocalyptic number.

80775782 is a deficient number, since it is larger than the sum of its proper divisors (40387894).

80775782 is a wasteful number, since it uses less digits than its factorization.

80775782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40387893.

The product of its (nonzero) digits is 219520, while the sum is 44.

The square root of 80775782 is about 8987.5348121718. The cubic root of 80775782 is about 432.2752696631.

The spelling of 80775782 in words is "eighty million, seven hundred seventy-five thousand, seven hundred eighty-two".