82642523428509 has 32 divisors (see below), whose sum is σ = 121009916252160. Its totient is φ = 49751993064000.

The previous prime is 82642523428499. The next prime is 82642523428513. The reversal of 82642523428509 is 90582432524628.

It is not a de Polignac number, because 82642523428509 - 2⁸ = 82642523428253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82642523428519) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 93825052 + ... + 94701770.

It is an arithmetic number, because the mean of its divisors is an integer number (3781559882880).

Almost surely, 2^{82642523428509} is an apocalyptic number.

It is an amenable number.

82642523428509 is a deficient number, since it is larger than the sum of its proper divisors (38367392823651).

82642523428509 is a wasteful number, since it uses less digits than its factorization.

82642523428509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 895801.

The product of its (nonzero) digits is 66355200, while the sum is 60.

The spelling of 82642523428509 in words is "eighty-two trillion, six hundred forty-two billion, five hundred twenty-three million, four hundred twenty-eight thousand, five hundred nine".