82640438030571 has 4 divisors (see below), whose sum is σ = 110187250707432. Its totient is φ = 55093625353712.

The previous prime is 82640438030567. The next prime is 82640438030603. The reversal of 82640438030571 is 17503083404628.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 82640438030571 - 2² = 82640438030567 is a prime.

It is a super-2 number, since 2×82640438030571² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (82640438034571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13773406338426 + ... + 13773406338431.

It is an arithmetic number, because the mean of its divisors is an integer number (27546812676858).

Almost surely, 2^{82640438030571} is an apocalyptic number.

82640438030571 is a deficient number, since it is larger than the sum of its proper divisors (27546812676861).

82640438030571 is a wasteful number, since it uses less digits than its factorization.

82640438030571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27546812676860.

The product of its (nonzero) digits is 3870720, while the sum is 51.

The spelling of 82640438030571 in words is "eighty-two trillion, six hundred forty billion, four hundred thirty-eight million, thirty thousand, five hundred seventy-one".