82228912578 has 18 divisors (see below), whose sum is σ = 178165279929. Its totient is φ = 27409231992.

The previous prime is 82228912567. The next prime is 82228912589. The reversal of 82228912578 is 87521982228.

82228912578 is a `hidden beast` number, since 82 + 228 + 91 + 257 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (82228912567) and next prime (82228912589).

It can be written as a sum of positive squares in 2 ways, for example, as 82114914249 + 113998329 = 286557^2 + 10677^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=202767.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1182808 + ... + 1250396.

Almost surely, 2^82228912578 is an apocalyptic number.

82228912578 is an abundant number, since it is smaller than the sum of its proper divisors (95936367351).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

82228912578 is an frugal number, since it uses more digits than its factorization.

82228912578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135186 (or 67594 counting only the distinct ones).

The product of its digits is 2580480, while the sum is 54.

The spelling of 82228912578 in words is "eighty-two billion, two hundred twenty-eight million, nine hundred twelve thousand, five hundred seventy-eight".