82787078728 has 8 divisors (see below), whose sum is σ = 155225772630. Its totient is φ = 41393539360.

The previous prime is 82787078719. The next prime is 82787078753.

82787078728 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 72456795684 + 10330283044 = 269178^2 + 101638^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 82787078728.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5174192413 + ... + 5174192428.

Almost surely, 2^82787078728 is an apocalyptic number.

It is an amenable number.

82787078728 is a deficient number, since it is larger than the sum of its proper divisors (72438693902).

82787078728 is a wasteful number, since it uses less digits than its factorization.

82787078728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10348384847 (or 10348384843 counting only the distinct ones).

The product of its (nonzero) digits is 39337984, while the sum is 64.

The spelling of 82787078728 in words is "eighty-two billion, seven hundred eighty-seven million, seventy-eight thousand, seven hundred twenty-eight".