80405226977 has 4 divisors (see below), whose sum is σ = 82366330116. Its totient is φ = 78444123840.

The previous prime is 80405226919. The next prime is 80405227009. The reversal of 80405226977 is 77962250408.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2010266896 + 78394960081 = 44836^2 + 279991^2 .

It is a cyclic number.

It is not a de Polignac number, because 80405226977 - 2³⁰ = 79331485153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80405226277) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 980551508 + ... + 980551589.

It is an arithmetic number, because the mean of its divisors is an integer number (20591582529).

Almost surely, 2^80405226977 is an apocalyptic number.

It is an amenable number.

80405226977 is a deficient number, since it is larger than the sum of its proper divisors (1961103139).

80405226977 is a wasteful number, since it uses less digits than its factorization.

80405226977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1961103138.

The product of its (nonzero) digits is 1693440, while the sum is 50.

The spelling of 80405226977 in words is "eighty billion, four hundred five million, two hundred twenty-six thousand, nine hundred seventy-seven".