81488330207 has 4 divisors (see below), whose sum is σ = 81490482216. Its totient is φ = 81486178200.

The previous prime is 81488330167. The next prime is 81488330237. The reversal of 81488330207 is 70203388418.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70203388418 = 2 ⋅35101694209.

It is a cyclic number.

It is not a de Polignac number, because 81488330207 - 2¹⁰ = 81488329183 is a prime.

It is a super-3 number, since 3×81488330207³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81488330237) 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 in 3 ways as a sum of consecutive naturals, for example, 1018169 + ... + 1095282.

It is an arithmetic number, because the mean of its divisors is an integer number (20372620554).

Almost surely, 2^81488330207 is an apocalyptic number.

81488330207 is a deficient number, since it is larger than the sum of its proper divisors (2152009).

81488330207 is a wasteful number, since it uses less digits than its factorization.

81488330207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2152008.

The product of its (nonzero) digits is 258048, while the sum is 44.

The spelling of 81488330207 in words is "eighty-one billion, four hundred eighty-eight million, three hundred thirty thousand, two hundred seven".