80405226978 has 16 divisors (see below), whose sum is σ = 170269892640. Its totient is φ = 25225169216.

The previous prime is 80405226919. The next prime is 80405227009. The reversal of 80405226978 is 87962250408.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 80405226978.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 394143168 + ... + 394143371.

It is an arithmetic number, because the mean of its divisors is an integer number (10641868290).

Almost surely, 2^80405226978 is an apocalyptic number.

80405226978 is an abundant number, since it is smaller than the sum of its proper divisors (89864665662).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

80405226978 is a wasteful number, since it uses less digits than its factorization.

80405226978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788286561.

The product of its (nonzero) digits is 1935360, while the sum is 51.

The spelling of 80405226978 in words is "eighty billion, four hundred five million, two hundred twenty-six thousand, nine hundred seventy-eight".