80778122 has 4 divisors (see below), whose sum is σ = 121167186. Its totient is φ = 40389060.

The previous prime is 80778121. The next prime is 80778127. The reversal of 80778122 is 22187708.

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., 80120401 + 657721 = 8951^2 + 811^2 .

It is not an unprimeable number, because it can be changed into a prime (80778121) 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, 20194529 + ... + 20194532.

Almost surely, 2^80778122 is an apocalyptic number.

80778122 is a deficient number, since it is larger than the sum of its proper divisors (40389064).

80778122 is a wasteful number, since it uses less digits than its factorization.

80778122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40389063.

The product of its (nonzero) digits is 12544, while the sum is 35.

The square root of 80778122 is about 8987.6649915314. The cubic root of 80778122 is about 432.2794438283.

The spelling of 80778122 in words is "eighty million, seven hundred seventy-eight thousand, one hundred twenty-two".