80281077782 has 4 divisors (see below), whose sum is σ = 120421616676. Its totient is φ = 40140538890.

The previous prime is 80281077781. The next prime is 80281077791. The reversal of 80281077782 is 28777018208.

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

It is a self number, because there is not a number n which added to its sum of digits gives 80281077782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80281077781) 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, 20070269444 + ... + 20070269447.

It is an arithmetic number, because the mean of its divisors is an integer number (30105404169).

Almost surely, 2^80281077782 is an apocalyptic number.

80281077782 is a deficient number, since it is larger than the sum of its proper divisors (40140538894).

80281077782 is a wasteful number, since it uses less digits than its factorization.

80281077782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40140538893.

The product of its (nonzero) digits is 702464, while the sum is 50.

The spelling of 80281077782 in words is "eighty billion, two hundred eighty-one million, seventy-seven thousand, seven hundred eighty-two".