80078641 has 4 divisors (see below), whose sum is σ = 80904292. Its totient is φ = 79252992.

The previous prime is 80078639. The next prime is 80078651. The reversal of 80078641 is 14687008.

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 64641600 + 15437041 = 8040^2 + 3929^2 .

It is a cyclic number.

It is not a de Polignac number, because 80078641 - 2¹ = 80078639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 80078597 and 80078606.

It is not an unprimeable number, because it can be changed into a prime (80078651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 412680 + ... + 412873.

It is an arithmetic number, because the mean of its divisors is an integer number (20226073).

Almost surely, 2^80078641 is an apocalyptic number.

It is an amenable number.

80078641 is a deficient number, since it is larger than the sum of its proper divisors (825651).

80078641 is an equidigital number, since it uses as much as digits as its factorization.

80078641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 825650.

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 80078641 is about 8948.6669957039. Note that the first 3 decimals coincide. The cubic root of 80078641 is about 431.0280808501.

The spelling of 80078641 in words is "eighty million, seventy-eight thousand, six hundred forty-one".