82517430778 has 8 divisors (see below), whose sum is σ = 123829207668. Its totient is φ = 41241028224.

The previous prime is 82517430773. The next prime is 82517430803. The reversal of 82517430778 is 87703471528.

It can be written as a sum of positive squares in 2 ways, for example, as 81388672369 + 1128758409 = 285287^2 + 33597^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (82517430773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8837751 + ... + 8847082.

Almost surely, 2^82517430778 is an apocalyptic number.

82517430778 is a deficient number, since it is larger than the sum of its proper divisors (41311776890).

82517430778 is a wasteful number, since it uses less digits than its factorization.

82517430778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17687168.

The product of its (nonzero) digits is 2634240, while the sum is 52.

The spelling of 82517430778 in words is "eighty-two billion, five hundred seventeen million, four hundred thirty thousand, seven hundred seventy-eight".