80821864524419 has 2 divisors, whose sum is σ = 80821864524420. Its totient is φ = 80821864524418.

The previous prime is 80821864524409. The next prime is 80821864524529. The reversal of 80821864524419 is 91442546812808.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80821864524419 is a prime.

It is a super-2 number, since 2×80821864524419² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (80821864524409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40410932262209 + 40410932262210.

It is an arithmetic number, because the mean of its divisors is an integer number (40410932262210).

Almost surely, 2^{80821864524419} is an apocalyptic number.

80821864524419 is a deficient number, since it is larger than the sum of its proper divisors (1).

80821864524419 is an equidigital number, since it uses as much as digits as its factorization.

80821864524419 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35389440, while the sum is 62.

The spelling of 80821864524419 in words is "eighty trillion, eight hundred twenty-one billion, eight hundred sixty-four million, five hundred twenty-four thousand, four hundred nineteen".