80555427021 has 4 divisors (see below), whose sum is σ = 107407236032. Its totient is φ = 53703618012.

The previous prime is 80555426969. The next prime is 80555427037. The reversal of 80555427021 is 12072455508.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 80555427021 - 2²¹ = 80553329869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80555427091) 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, 13425904501 + ... + 13425904506.

It is an arithmetic number, because the mean of its divisors is an integer number (26851809008).

Almost surely, 2^80555427021 is an apocalyptic number.

It is an amenable number.

80555427021 is a deficient number, since it is larger than the sum of its proper divisors (26851809011).

80555427021 is a wasteful number, since it uses less digits than its factorization.

80555427021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26851809010.

The product of its (nonzero) digits is 112000, while the sum is 39.

The spelling of 80555427021 in words is "eighty billion, five hundred fifty-five million, four hundred twenty-seven thousand, twenty-one".