82510650509 has 36 divisors (see below), whose sum is σ = 101522817312. Its totient is φ = 65667436800.

The previous prime is 82510650503. The next prime is 82510650533. The reversal of 82510650509 is 90505601528.

It is not a de Polignac number, because 82510650509 - 2³² = 78215683213 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82510650503) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 117703859 + ... + 117704559.

Almost surely, 2^82510650509 is an apocalyptic number.

It is an amenable number.

82510650509 is a deficient number, since it is larger than the sum of its proper divisors (19012166803).

82510650509 is an frugal number, since it uses more digits than its factorization.

82510650509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1526 (or 808 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 41.

The spelling of 82510650509 in words is "eighty-two billion, five hundred ten million, six hundred fifty thousand, five hundred nine".