81453328147 has 2 divisors, whose sum is σ = 81453328148. Its totient is φ = 81453328146.

The previous prime is 81453328139. The next prime is 81453328247. The reversal of 81453328147 is 74182335418.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81453328147 - 2³ = 81453328139 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 81453328097 and 81453328106.

It is not a weakly prime, because it can be changed into another prime (81453328247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40726664073 + 40726664074.

It is an arithmetic number, because the mean of its divisors is an integer number (40726664074).

Almost surely, 2^81453328147 is an apocalyptic number.

81453328147 is a deficient number, since it is larger than the sum of its proper divisors (1).

81453328147 is an equidigital number, since it uses as much as digits as its factorization.

81453328147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 645120, while the sum is 46.

It can be divided in two parts, 81453 and 328147, that added together give a square (409600 = 640²).

The spelling of 81453328147 in words is "eighty-one billion, four hundred fifty-three million, three hundred twenty-eight thousand, one hundred forty-seven".