80721037741 has 2 divisors, whose sum is σ = 80721037742. Its totient is φ = 80721037740.

The previous prime is 80721037739. The next prime is 80721037757. The reversal of 80721037741 is 14773012708.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80253224100 + 467813641 = 283290^2 + 21629^2 .

It is a cyclic number.

It is not a de Polignac number, because 80721037741 - 2¹ = 80721037739 is a prime.

Together with 80721037739, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 80721037694 and 80721037703.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80721037781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40360518870 + 40360518871.

It is an arithmetic number, because the mean of its divisors is an integer number (40360518871).

Almost surely, 2^80721037741 is an apocalyptic number.

It is an amenable number.

80721037741 is a deficient number, since it is larger than the sum of its proper divisors (1).

80721037741 is an equidigital number, since it uses as much as digits as its factorization.

80721037741 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 65856, while the sum is 40.

The spelling of 80721037741 in words is "eighty billion, seven hundred twenty-one million, thirty-seven thousand, seven hundred forty-one".