80756277421 has 2 divisors, whose sum is σ = 80756277422. Its totient is φ = 80756277420.

The previous prime is 80756277419. The next prime is 80756277533. The reversal of 80756277421 is 12477265708.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59501844900 + 21254432521 = 243930^2 + 145789^2 .

It is a cyclic number.

It is not a de Polignac number, because 80756277421 - 2¹ = 80756277419 is a prime.

It is a super-2 number, since 2×80756277421² (a number of 23 digits) contains 22 as substring.

Together with 80756277419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80756277401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40378138710 + 40378138711.

It is an arithmetic number, because the mean of its divisors is an integer number (40378138711).

Almost surely, 2^80756277421 is an apocalyptic number.

It is an amenable number.

80756277421 is a deficient number, since it is larger than the sum of its proper divisors (1).

80756277421 is an equidigital number, since it uses as much as digits as its factorization.

80756277421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1317120, while the sum is 49.

The spelling of 80756277421 in words is "eighty billion, seven hundred fifty-six million, two hundred seventy-seven thousand, four hundred twenty-one".