80457021389 has 4 divisors (see below), whose sum is σ = 80458370556. Its totient is φ = 80455672224.

The previous prime is 80457021383. The next prime is 80457021401. The reversal of 80457021389 is 98312075408.

It is a happy number.

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 28503568900 + 51953452489 = 168830^2 + 227933^2 .

It is a cyclic number.

It is not a de Polignac number, because 80457021389 - 2⁴ = 80457021373 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 (80457021383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 580784 + ... + 705849.

It is an arithmetic number, because the mean of its divisors is an integer number (20114592639).

Almost surely, 2^80457021389 is an apocalyptic number.

It is an amenable number.

80457021389 is a deficient number, since it is larger than the sum of its proper divisors (1349167).

80457021389 is a wasteful number, since it uses less digits than its factorization.

80457021389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1349166.

The product of its (nonzero) digits is 483840, while the sum is 47.

The spelling of 80457021389 in words is "eighty billion, four hundred fifty-seven million, twenty-one thousand, three hundred eighty-nine".