18000075000078 has 48 divisors (see below), whose sum is σ = 40345432760880. Its totient is φ = 5793064827648.

The previous prime is 18000075000013. The next prime is 18000075000079. The reversal of 18000075000078 is 87000057000081.

18000075000078 is a `hidden beast` number, since 1 + 80 + 0 + 0 + 0 + 7 + 500 + 0 + 0 + 78 = 666.

18000075000078 is a nontrivial binomial coefficient, being equal to C(6000013, 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18000075000079) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 86896726 + ... + 87103622.

It is an arithmetic number, because the mean of its divisors is an integer number (840529849185).

Almost surely, 2^{18000075000078} is an apocalyptic number.

18000075000078 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

18000075000078 is the 6000012-nd triangular number.

18000075000078 is an abundant number, since it is smaller than the sum of its proper divisors (22345357760802).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18000075000078 is a wasteful number, since it uses less digits than its factorization.

18000075000078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373601 (or 373598 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 36.

The spelling of 18000075000078 in words is "eighteen trillion, seventy-five million, seventy-eight", and thus it is an aban number and an uban number.