82505658818 has 16 divisors (see below), whose sum is σ = 135837543456. Its totient is φ = 37272493440.

The previous prime is 82505658757. The next prime is 82505658821. The reversal of 82505658818 is 81885650528.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11500271 + ... + 11507442.

It is an arithmetic number, because the mean of its divisors is an integer number (8489846466).

Almost surely, 2^82505658818 is an apocalyptic number.

82505658818 is a deficient number, since it is larger than the sum of its proper divisors (53331884638).

82505658818 is a wasteful number, since it uses less digits than its factorization.

82505658818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23007889.

The product of its (nonzero) digits is 6144000, while the sum is 56.

The spelling of 82505658818 in words is "eighty-two billion, five hundred five million, six hundred fifty-eight thousand, eight hundred eighteen".