78174566828 has 6 divisors (see below), whose sum is σ = 136805491956. Its totient is φ = 39087283412.

The previous prime is 78174566819. The next prime is 78174566863. The reversal of 78174566828 is 82866547187.

It is a super-2 number, since 2×78174566828² (a number of 23 digits) contains 22 as substring.

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, 9771820850 + ... + 9771820857.

It is an arithmetic number, because the mean of its divisors is an integer number (22800915326).

Almost surely, 2^78174566828 is an apocalyptic number.

It is an amenable number.

78174566828 is a deficient number, since it is larger than the sum of its proper divisors (58630925128).

78174566828 is a wasteful number, since it uses less digits than its factorization.

78174566828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19543641711 (or 19543641709 counting only the distinct ones).

The product of its digits is 36126720, while the sum is 62.

The spelling of 78174566828 in words is "seventy-eight billion, one hundred seventy-four million, five hundred sixty-six thousand, eight hundred twenty-eight".