8071873978 has 24 divisors (see below), whose sum is σ = 14570277300. Its totient is φ = 3340084608.

The previous prime is 8071873967. The next prime is 8071873993. The reversal of 8071873978 is 8793781708.

It can be written as a sum of positive squares in 2 ways, for example, as 7879580289 + 192293689 = 88767^2 + 13867^2 .

It is a Harshad number since it is a multiple of its sum of digits (58).

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 in 11 ways as a sum of consecutive naturals, for example, 1417263 + ... + 1422946.

Almost surely, 2^8071873978 is an apocalyptic number.

8071873978 is a deficient number, since it is larger than the sum of its proper divisors (6498403322).

8071873978 is a wasteful number, since it uses less digits than its factorization.

8071873978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2840254 (or 2840247 counting only the distinct ones).

The product of its (nonzero) digits is 4741632, while the sum is 58.

The square root of 8071873978 is about 89843.6084426711. The cubic root of 8071873978 is about 2005.9716501180.

The spelling of 8071873978 in words is "eight billion, seventy-one million, eight hundred seventy-three thousand, nine hundred seventy-eight".