81083026128407 has 2 divisors, whose sum is σ = 81083026128408. Its totient is φ = 81083026128406.

The previous prime is 81083026128389. The next prime is 81083026128427. The reversal of 81083026128407 is 70482162038018.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81083026128407 - 2⁸ = 81083026128151 is a prime.

It is a super-2 number, since 2×81083026128407² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81083026128427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40541513064203 + 40541513064204.

It is an arithmetic number, because the mean of its divisors is an integer number (40541513064204).

Almost surely, 2^{81083026128407} is an apocalyptic number.

81083026128407 is a deficient number, since it is larger than the sum of its proper divisors (1).

81083026128407 is an equidigital number, since it uses as much as digits as its factorization.

81083026128407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1032192, while the sum is 50.

The spelling of 81083026128407 in words is "eighty-one trillion, eighty-three billion, twenty-six million, one hundred twenty-eight thousand, four hundred seven".