80641786005 has 40 divisors (see below), whose sum is σ = 157699501344. Its totient is φ = 39099045600.

The previous prime is 80641786003. The next prime is 80641786031. The reversal of 80641786005 is 50068714608.

It is a happy number.

It is not a de Polignac number, because 80641786005 - 2¹ = 80641786003 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80641786003) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 9046251 + ... + 9055160.

Almost surely, 2^80641786005 is an apocalyptic number.

It is an amenable number.

80641786005 is a deficient number, since it is larger than the sum of its proper divisors (77057715339).

80641786005 is a wasteful number, since it uses less digits than its factorization.

80641786005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18101439 (or 18101430 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The spelling of 80641786005 in words is "eighty billion, six hundred forty-one million, seven hundred eighty-six thousand, five".