80644926806 has 16 divisors (see below), whose sum is σ = 122612660016. Its totient is φ = 39776749056.

The previous prime is 80644926773. The next prime is 80644926809. The reversal of 80644926806 is 60862944608.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80644926809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 617471 + ... + 736586.

It is an arithmetic number, because the mean of its divisors is an integer number (7663291251).

Almost surely, 2^80644926806 is an apocalyptic number.

80644926806 is a deficient number, since it is larger than the sum of its proper divisors (41967733210).

80644926806 is a wasteful number, since it uses less digits than its factorization.

80644926806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1354463.

The product of its (nonzero) digits is 3981312, while the sum is 53.

The spelling of 80644926806 in words is "eighty billion, six hundred forty-four million, nine hundred twenty-six thousand, eight hundred six".