80738756641 has 2 divisors, whose sum is σ = 80738756642. Its totient is φ = 80738756640.

The previous prime is 80738756639. The next prime is 80738756669. The reversal of 80738756641 is 14665783708.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41207376016 + 39531380625 = 202996^2 + 198825^2 .

It is a cyclic number.

It is not a de Polignac number, because 80738756641 - 2¹ = 80738756639 is a prime.

Together with 80738756639, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (80738756671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40369378320 + 40369378321.

It is an arithmetic number, because the mean of its divisors is an integer number (40369378321).

Almost surely, 2^80738756641 is an apocalyptic number.

It is an amenable number.

80738756641 is a deficient number, since it is larger than the sum of its proper divisors (1).

80738756641 is an equidigital number, since it uses as much as digits as its factorization.

80738756641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6773760, while the sum is 55.

The spelling of 80738756641 in words is "eighty billion, seven hundred thirty-eight million, seven hundred fifty-six thousand, six hundred forty-one".