82645516808 has 8 divisors (see below), whose sum is σ = 154960344030. Its totient is φ = 41322758400.

The previous prime is 82645516799. The next prime is 82645516819. The reversal of 82645516808 is 80861554628.

It can be written as a sum of positive squares in only one way, i.e., 41323571524 + 41321945284 = 203282^2 + 203278^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×82645516808² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 82645516808.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5165344793 + ... + 5165344808.

Almost surely, 2^82645516808 is an apocalyptic number.

It is an amenable number.

82645516808 is a deficient number, since it is larger than the sum of its proper divisors (72314827222).

82645516808 is a wasteful number, since it uses less digits than its factorization.

82645516808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10330689607 (or 10330689603 counting only the distinct ones).

The product of its (nonzero) digits is 3686400, while the sum is 53.

The spelling of 82645516808 in words is "eighty-two billion, six hundred forty-five million, five hundred sixteen thousand, eight hundred eight".