8000050000078 has 16 divisors (see below), whose sum is σ = 12631730526720. Its totient is φ = 3789475578936.

The previous prime is 8000050000067. The next prime is 8000050000081. The reversal of 8000050000078 is 8700000500008.

8000050000078 is a nontrivial binomial coefficient, being equal to C(4000013, 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7500025 + ... + 8500027.

It is an arithmetic number, because the mean of its divisors is an integer number (789483157920).

Almost surely, 2^{8000050000078} is an apocalyptic number.

8000050000078 is the 4000012-nd triangular number.

8000050000078 is the 1333338-th centered nonagonal number.

8000050000078 is a deficient number, since it is larger than the sum of its proper divisors (4631680526642).

8000050000078 is a wasteful number, since it uses less digits than its factorization.

8000050000078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1210551.

The product of its (nonzero) digits is 2240, while the sum is 28.

The spelling of 8000050000078 in words is "eight trillion, fifty million, seventy-eight", and thus it is an aban number and an uban number.